#include "SDL_config.h"
#include "SDL_assert.h"
#include "SDL_hints.h"
#include "SDL_log.h"
#include "SDL_render.h"
#include "SDL_sysrender.h"
#include "software/SDL_render_sw_c.h"

Macros
#define	CHECK_RENDERER_MAGIC(renderer, retval)

#define	CHECK_TEXTURE_MAGIC(texture, retval)

#define	SDL_WINDOWRENDERDATA "_SDL_WindowRenderData"

Functions
static Uint32	GetClosestSupportedFormat (SDL_Renderer *renderer, Uint32 format)

static SDL_bool	IsSupportedFormat (SDL_Renderer *renderer, Uint32 format)

static int	RenderDrawLinesWithRects (SDL_Renderer renderer, const SDL_Point points, int count)

static int	RenderDrawPointsWithRects (SDL_Renderer renderer, const SDL_Point points, int count)

SDL_Renderer *	SDL_CreateRenderer (SDL_Window *window, int index, Uint32 flags)
	Create a 2D rendering context for a window. More...

SDL_Renderer *	SDL_CreateSoftwareRenderer (SDL_Surface *surface)
	Create a 2D software rendering context for a surface. More...

SDL_Texture *	SDL_CreateTexture (SDL_Renderer *renderer, Uint32 format, int access, int w, int h)
	Create a texture for a rendering context. More...

SDL_Texture *	SDL_CreateTextureFromSurface (SDL_Renderer renderer, SDL_Surface surface)
	Create a texture from an existing surface. More...

int	SDL_CreateWindowAndRenderer (int width, int height, Uint32 window_flags, SDL_Window window, SDL_Renderer renderer)
	Create a window and default renderer. More...

void	SDL_DestroyRenderer (SDL_Renderer *renderer)
	Destroy the rendering context for a window and free associated textures. More...

void	SDL_DestroyTexture (SDL_Texture *texture)
	Destroy the specified texture. More...

int	SDL_GetNumRenderDrivers (void)
	Get the number of 2D rendering drivers available for the current display. More...

int	SDL_GetRenderDrawBlendMode (SDL_Renderer renderer, SDL_BlendMode blendMode)
	Get the blend mode used for drawing operations. More...

int	SDL_GetRenderDrawColor (SDL_Renderer renderer, Uint8 r, Uint8 g, Uint8 b, Uint8 *a)
	Get the color used for drawing operations (Rect, Line and Clear). More...

int	SDL_GetRenderDriverInfo (int index, SDL_RendererInfo *info)
	Get information about a specific 2D rendering driver for the current display. More...

SDL_Renderer *	SDL_GetRenderer (SDL_Window *window)
	Get the renderer associated with a window. More...

int	SDL_GetRendererInfo (SDL_Renderer renderer, SDL_RendererInfo info)
	Get information about a rendering context. More...

int	SDL_GetRendererOutputSize (SDL_Renderer renderer, int w, int *h)
	Get the output size of a rendering context. More...

SDL_Texture *	SDL_GetRenderTarget (SDL_Renderer *renderer)
	Get the current render target or NULL for the default render target. More...

int	SDL_GetTextureAlphaMod (SDL_Texture texture, Uint8 alpha)
	Get the additional alpha value used in render copy operations. More...

int	SDL_GetTextureBlendMode (SDL_Texture texture, SDL_BlendMode blendMode)
	Get the blend mode used for texture copy operations. More...

int	SDL_GetTextureColorMod (SDL_Texture texture, Uint8 r, Uint8 g, Uint8 b)
	Get the additional color value used in render copy operations. More...

int	SDL_GL_BindTexture (SDL_Texture texture, float texw, float *texh)
	Bind the texture to the current OpenGL/ES/ES2 context for use with OpenGL instructions. More...

int	SDL_GL_UnbindTexture (SDL_Texture *texture)
	Unbind a texture from the current OpenGL/ES/ES2 context. More...

int	SDL_LockTexture (SDL_Texture texture, const SDL_Rect rect, void *pixels, int pitch)
	Lock a portion of the texture for write-only pixel access. More...

static int	SDL_LockTextureNative (SDL_Texture texture, const SDL_Rect rect, void *pixels, int pitch)

static int	SDL_LockTextureYUV (SDL_Texture texture, const SDL_Rect rect, void *pixels, int pitch)

int	SDL_QueryTexture (SDL_Texture texture, Uint32 format, int access, int w, int *h)
	Query the attributes of a texture. More...

int	SDL_RenderClear (SDL_Renderer *renderer)
	Clear the current rendering target with the drawing color. More...

int	SDL_RenderCopy (SDL_Renderer renderer, SDL_Texture texture, const SDL_Rect srcrect, const SDL_Rect dstrect)
	Copy a portion of the texture to the current rendering target. More...

int	SDL_RenderCopyEx (SDL_Renderer renderer, SDL_Texture texture, const SDL_Rect srcrect, const SDL_Rect dstrect, const double angle, const SDL_Point *center, const SDL_RendererFlip flip)
	Copy a portion of the source texture to the current rendering target, rotating it by angle around the given center. More...

int	SDL_RenderDrawLine (SDL_Renderer *renderer, int x1, int y1, int x2, int y2)
	Draw a line on the current rendering target. More...

int	SDL_RenderDrawLines (SDL_Renderer renderer, const SDL_Point points, int count)
	Draw a series of connected lines on the current rendering target. More...

int	SDL_RenderDrawPoint (SDL_Renderer *renderer, int x, int y)
	Draw a point on the current rendering target. More...

int	SDL_RenderDrawPoints (SDL_Renderer renderer, const SDL_Point points, int count)
	Draw multiple points on the current rendering target. More...

int	SDL_RenderDrawRect (SDL_Renderer renderer, const SDL_Rect rect)
	Draw a rectangle on the current rendering target. More...

int	SDL_RenderDrawRects (SDL_Renderer renderer, const SDL_Rect rects, int count)
	Draw some number of rectangles on the current rendering target. More...

static int	SDL_RendererEventWatch (void userdata, SDL_Event event)

int	SDL_RenderFillRect (SDL_Renderer renderer, const SDL_Rect rect)
	Fill a rectangle on the current rendering target with the drawing color. More...

int	SDL_RenderFillRects (SDL_Renderer renderer, const SDL_Rect rects, int count)
	Fill some number of rectangles on the current rendering target with the drawing color. More...

void	SDL_RenderGetClipRect (SDL_Renderer renderer, SDL_Rect rect)
	Get the clip rectangle for the current target. More...

void	SDL_RenderGetLogicalSize (SDL_Renderer renderer, int w, int *h)
	Get device independent resolution for rendering. More...

void	SDL_RenderGetScale (SDL_Renderer renderer, float scaleX, float *scaleY)
	Get the drawing scale for the current target. More...

void	SDL_RenderGetViewport (SDL_Renderer renderer, SDL_Rect rect)
	Get the drawing area for the current target. More...

void	SDL_RenderPresent (SDL_Renderer *renderer)
	Update the screen with rendering performed. More...

int	SDL_RenderReadPixels (SDL_Renderer renderer, const SDL_Rect rect, Uint32 format, void *pixels, int pitch)
	Read pixels from the current rendering target. More...

int	SDL_RenderSetClipRect (SDL_Renderer renderer, const SDL_Rect rect)
	Set the clip rectangle for the current target. More...

int	SDL_RenderSetLogicalSize (SDL_Renderer *renderer, int w, int h)
	Set device independent resolution for rendering. More...

int	SDL_RenderSetScale (SDL_Renderer *renderer, float scaleX, float scaleY)
	Set the drawing scale for rendering on the current target. More...

int	SDL_RenderSetViewport (SDL_Renderer renderer, const SDL_Rect rect)
	Set the drawing area for rendering on the current target. More...

SDL_bool	SDL_RenderTargetSupported (SDL_Renderer *renderer)
	Determines whether a window supports the use of render targets. More...

int	SDL_SetRenderDrawBlendMode (SDL_Renderer *renderer, SDL_BlendMode blendMode)
	Set the blend mode used for drawing operations (Fill and Line). More...

int	SDL_SetRenderDrawColor (SDL_Renderer *renderer, Uint8 r, Uint8 g, Uint8 b, Uint8 a)
	Set the color used for drawing operations (Rect, Line and Clear). More...

int	SDL_SetRenderTarget (SDL_Renderer renderer, SDL_Texture texture)
	Set a texture as the current rendering target. More...

int	SDL_SetTextureAlphaMod (SDL_Texture *texture, Uint8 alpha)
	Set an additional alpha value used in render copy operations. More...

int	SDL_SetTextureBlendMode (SDL_Texture *texture, SDL_BlendMode blendMode)
	Set the blend mode used for texture copy operations. More...

int	SDL_SetTextureColorMod (SDL_Texture *texture, Uint8 r, Uint8 g, Uint8 b)
	Set an additional color value used in render copy operations. More...

void	SDL_UnlockTexture (SDL_Texture *texture)
	Unlock a texture, uploading the changes to video memory, if needed. More...

static void	SDL_UnlockTextureNative (SDL_Texture *texture)

static void	SDL_UnlockTextureYUV (SDL_Texture *texture)

int	SDL_UpdateTexture (SDL_Texture texture, const SDL_Rect rect, const void *pixels, int pitch)
	Update the given texture rectangle with new pixel data. More...

static int	SDL_UpdateTextureNative (SDL_Texture texture, const SDL_Rect rect, const void *pixels, int pitch)

static int	SDL_UpdateTextureYUV (SDL_Texture texture, const SDL_Rect rect, const void *pixels, int pitch)

static int	SDL_UpdateTextureYUVPlanar (SDL_Texture texture, const SDL_Rect rect, const Uint8 Yplane, int Ypitch, const Uint8 Uplane, int Upitch, const Uint8 *Vplane, int Vpitch)

int	SDL_UpdateYUVTexture (SDL_Texture texture, const SDL_Rect rect, const Uint8 Yplane, int Ypitch, const Uint8 Uplane, int Upitch, const Uint8 *Vplane, int Vpitch)
	Update a rectangle within a planar YV12 or IYUV texture with new pixel data. More...

static int	UpdateLogicalSize (SDL_Renderer *renderer)

Variables
static const SDL_RenderDriver *	render_drivers []

static char	renderer_magic

static char	texture_magic

Macro Definition Documentation

#define CHECK_RENDERER_MAGIC	(	renderer,
		retval
	)

Value:

if (!renderer || renderer->magic != &renderer_magic) { \
        SDL_SetError("Invalid renderer"); \
        return retval; \
    }

Definition at line 35 of file SDL_render.c.

Referenced by SDL_CreateTexture(), SDL_CreateTextureFromSurface(), SDL_DestroyRenderer(), SDL_GetRenderDrawBlendMode(), SDL_GetRenderDrawColor(), SDL_GetRendererInfo(), SDL_GetRendererOutputSize(), SDL_RenderClear(), SDL_RenderCopy(), SDL_RenderCopyEx(), SDL_RenderDrawLines(), SDL_RenderDrawPoints(), SDL_RenderDrawRect(), SDL_RenderDrawRects(), SDL_RenderFillRect(), SDL_RenderFillRects(), SDL_RenderGetClipRect(), SDL_RenderGetLogicalSize(), SDL_RenderGetScale(), SDL_RenderGetViewport(), SDL_RenderPresent(), SDL_RenderReadPixels(), SDL_RenderSetClipRect(), SDL_RenderSetLogicalSize(), SDL_RenderSetScale(), SDL_RenderSetViewport(), SDL_SetRenderDrawBlendMode(), and SDL_SetRenderDrawColor().

#define CHECK_TEXTURE_MAGIC	(	texture,
		retval
	)

Value:

if (!texture || texture->magic != &texture_magic) { \
        SDL_SetError("Invalid texture"); \
        return retval; \
    }

Definition at line 41 of file SDL_render.c.

Referenced by SDL_DestroyTexture(), SDL_GetTextureAlphaMod(), SDL_GetTextureBlendMode(), SDL_GetTextureColorMod(), SDL_GL_BindTexture(), SDL_GL_UnbindTexture(), SDL_LockTexture(), SDL_QueryTexture(), SDL_RenderCopy(), SDL_RenderCopyEx(), SDL_SetRenderTarget(), SDL_SetTextureAlphaMod(), SDL_SetTextureBlendMode(), SDL_SetTextureColorMod(), SDL_UnlockTexture(), SDL_UpdateTexture(), and SDL_UpdateYUVTexture().

#define SDL_WINDOWRENDERDATA "_SDL_WindowRenderData"

Definition at line 33 of file SDL_render.c.

Referenced by SDL_CreateRenderer(), SDL_DestroyRenderer(), and SDL_GetRenderer().

Function Documentation

static Uint32 GetClosestSupportedFormat	(	SDL_Renderer *	renderer,
		Uint32	format
	)

static

Definition at line 370 of file SDL_render.c.

References i, SDL_Renderer::info, SDL_RendererInfo::num_texture_formats, SDL_ISPIXELFORMAT_ALPHA, SDL_ISPIXELFORMAT_FOURCC, and SDL_RendererInfo::texture_formats.

Referenced by SDL_CreateTexture().

static SDL_bool IsSupportedFormat	(	SDL_Renderer *	renderer,
		Uint32	format
	)

static

Definition at line 357 of file SDL_render.c.

References i, SDL_Renderer::info, SDL_RendererInfo::num_texture_formats, SDL_FALSE, SDL_TRUE, and SDL_RendererInfo::texture_formats.

Referenced by SDL_CreateTexture().

static int RenderDrawLinesWithRects	(	SDL_Renderer *	renderer,
		const SDL_Point *	points,
		int	count
	)

static

Definition at line 1425 of file SDL_render.c.

References SDL_FRect::h, i, SDL_Renderer::RenderDrawLines, SDL_Renderer::RenderFillRects, SDL_Renderer::scale, SDL_max, SDL_min, SDL_OutOfMemory, SDL_stack_alloc, SDL_stack_free, SDL_FRect::w, SDL_FPoint::x, SDL_FRect::x, SDL_Point::x, SDL_FPoint::y, SDL_FRect::y, and SDL_Point::y.

Referenced by SDL_RenderDrawLines().

static int RenderDrawPointsWithRects	(	SDL_Renderer *	renderer,
		const SDL_Point *	points,
		int	count
	)

static

Definition at line 1346 of file SDL_render.c.

References SDL_FRect::h, i, SDL_Renderer::RenderFillRects, SDL_Renderer::scale, SDL_OutOfMemory, SDL_stack_alloc, SDL_stack_free, SDL_FRect::w, SDL_FPoint::x, SDL_FRect::x, SDL_Point::x, SDL_FPoint::y, SDL_FRect::y, and SDL_Point::y.

Referenced by SDL_RenderDrawPoints().

SDL_Renderer* SDL_CreateRenderer	(	SDL_Window *	window,
		int	index,
		Uint32	flags
	)

Create a 2D rendering context for a window.

Parameters

window	The window where rendering is displayed.
index	The index of the rendering driver to initialize, or -1 to initialize the first one supporting the requested flags.
flags	SDL_RendererFlags.

Returns: A valid rendering context or NULL if there was an error.

See Also: SDL_CreateSoftwareRenderer(); SDL_GetRendererInfo(); SDL_DestroyRenderer()

Definition at line 204 of file SDL_render.c.

References SDL_RenderDriver::CreateRenderer, SDL_RendererInfo::flags, SDL_Renderer::hidden, SDL_Renderer::info, SDL_RenderDriver::info, SDL_Renderer::magic, SDL_RendererInfo::name, NULL, renderer_magic, SDL_Renderer::scale, SDL_AddEventWatch(), SDL_FALSE, SDL_GetHint(), SDL_GetNumRenderDrivers(), SDL_GetRenderer(), SDL_GetWindowFlags(), SDL_HINT_RENDER_DRIVER, SDL_HINT_RENDER_VSYNC, SDL_LOG_CATEGORY_RENDER, SDL_LogInfo(), SDL_RENDERER_PRESENTVSYNC, SDL_RendererEventWatch(), SDL_RenderSetViewport(), SDL_SetError(), SDL_SetWindowData(), SDL_strcasecmp(), SDL_TRUE, SDL_WINDOW_HIDDEN, SDL_WINDOW_MINIMIZED, SDL_WINDOWRENDERDATA, SDL_Renderer::window, SDL_FPoint::x, and SDL_FPoint::y.

Referenced by SDL_CreateWindowAndRenderer(), SDL_CreateWindowTexture(), and SDLTest_CommonInit().

SDL_Renderer* SDL_CreateSoftwareRenderer ( SDL_Surface * surface )

Create a 2D software rendering context for a surface.

Parameters

surface The surface where rendering is done.

Returns: A valid rendering context or NULL if there was an error.

See Also: SDL_CreateRenderer(); SDL_DestroyRenderer()

Definition at line 301 of file SDL_render.c.

References SDL_Renderer::magic, NULL, renderer_magic, SDL_Renderer::scale, SDL_RenderSetViewport(), SDL_SetError(), SW_CreateRendererForSurface(), SDL_FPoint::x, and SDL_FPoint::y.

SDL_Texture* SDL_CreateTexture	(	SDL_Renderer *	renderer,
		Uint32	format,
		int	access,
		int	w,
		int	h
	)

Create a texture for a rendering context.

Parameters

renderer	The renderer.
format	The format of the texture.
access	One of the enumerated values in SDL_TextureAccess.
w	The width of the texture in pixels.
h	The height of the texture in pixels.

Returns: The created texture is returned, or 0 if no rendering context was active, the format was unsupported, or the width or height were out of range.

See Also: SDL_QueryTexture(); SDL_UpdateTexture(); SDL_DestroyTexture()

Definition at line 396 of file SDL_render.c.

References SDL_Texture::a, SDL_Texture::access, SDL_Texture::b, CHECK_RENDERER_MAGIC, SDL_Renderer::CreateTexture, SDL_Texture::format, SDL_Texture::g, GetClosestSupportedFormat(), SDL_Texture::h, SDL_Renderer::info, IsSupportedFormat(), SDL_Texture::magic, SDL_Texture::native, SDL_Texture::next, NULL, SDL_Texture::pitch, SDL_Texture::pixels, SDL_Texture::prev, SDL_Texture::r, SDL_Texture::renderer, SDL_BYTESPERPIXEL, SDL_calloc(), SDL_CreateTexture(), SDL_DestroyTexture(), SDL_ISPIXELFORMAT_FOURCC, SDL_ISPIXELFORMAT_INDEXED, SDL_OutOfMemory, SDL_SetError(), SDL_SW_CreateYUVTexture(), SDL_TEXTUREACCESS_STREAMING, SDL_RendererInfo::texture_formats, texture_magic, SDL_Renderer::textures, SDL_Texture::w, and SDL_Texture::yuv.

Referenced by SDL_CreateTexture(), SDL_CreateTextureFromSurface(), and SDL_CreateWindowTexture().

SDL_Texture* SDL_CreateTextureFromSurface	(	SDL_Renderer *	renderer,
		SDL_Surface *	surface
	)

Create a texture from an existing surface.

Parameters

renderer	The renderer.
surface	The surface containing pixel data used to fill the texture.

Returns: The created texture is returned, or 0 on error.

Note: The surface is not modified or freed by this function.

See Also: SDL_QueryTexture(); SDL_DestroyTexture()

Definition at line 481 of file SDL_render.c.

References SDL_PixelFormat::Amask, CHECK_RENDERER_MAGIC, SDL_Surface::format, SDL_PixelFormat::format, SDL_Surface::h, i, SDL_Renderer::info, NULL, SDL_RendererInfo::num_texture_formats, SDL_Surface::pitch, SDL_Surface::pixels, SDL_AllocFormat(), SDL_BLENDMODE_BLEND, SDL_ConvertSurface(), SDL_CreateTexture(), SDL_DestroyTexture(), SDL_FALSE, SDL_FreeFormat(), SDL_FreeSurface(), SDL_GetColorKey(), SDL_GetSurfaceAlphaMod(), SDL_GetSurfaceBlendMode(), SDL_GetSurfaceColorMod(), SDL_ISPIXELFORMAT_ALPHA, SDL_ISPIXELFORMAT_FOURCC, SDL_LockSurface(), SDL_MUSTLOCK, SDL_SetError(), SDL_SetTextureAlphaMod(), SDL_SetTextureBlendMode(), SDL_SetTextureColorMod(), SDL_TEXTUREACCESS_STATIC, SDL_TRUE, SDL_UnlockSurface(), SDL_UpdateTexture(), SDL_RendererInfo::texture_formats, and SDL_Surface::w.

Referenced by SDLTest_DrawCharacter().

int SDL_CreateWindowAndRenderer	(	int	width,
		int	height,
		Uint32	window_flags,
		SDL_Window **	window,
		SDL_Renderer **	renderer
	)

Create a window and default renderer.

Parameters

width	The width of the window
height	The height of the window
window_flags	The flags used to create the window
window	A pointer filled with the window, or NULL on error
renderer	A pointer filled with the renderer, or NULL on error

Returns: 0 on success, or -1 on error

Definition at line 184 of file SDL_render.c.

References NULL, SDL_CreateRenderer(), SDL_CreateWindow(), and SDL_WINDOWPOS_UNDEFINED.

void SDL_DestroyRenderer ( SDL_Renderer * renderer )

Destroy the rendering context for a window and free associated textures.

See Also: SDL_CreateRenderer()

Definition at line 1832 of file SDL_render.c.

References CHECK_RENDERER_MAGIC, SDL_Renderer::DestroyRenderer, SDL_Renderer::magic, NULL, SDL_DelEventWatch(), SDL_DestroyTexture(), SDL_RendererEventWatch(), SDL_SetWindowData(), SDL_WINDOWRENDERDATA, SDL_Renderer::textures, and SDL_Renderer::window.

Referenced by SDL_CreateWindowTexture(), SDL_DestroyWindowTexture(), and SDLTest_CommonQuit().

void SDL_DestroyTexture ( SDL_Texture * texture )

Destroy the specified texture.

See Also: SDL_CreateTexture(); SDL_CreateTextureFromSurface()

Definition at line 1797 of file SDL_render.c.

References CHECK_TEXTURE_MAGIC, SDL_Renderer::DestroyTexture, SDL_Texture::magic, SDL_Texture::native, SDL_Texture::next, NULL, SDL_Texture::pixels, SDL_Texture::prev, SDL_Texture::renderer, SDL_DestroyTexture(), SDL_free(), SDL_SetRenderTarget(), SDL_SW_DestroyYUVTexture(), SDL_Renderer::target, SDL_Renderer::textures, and SDL_Texture::yuv.

Referenced by SDL_CreateTexture(), SDL_CreateTextureFromSurface(), SDL_CreateWindowTexture(), SDL_DestroyRenderer(), SDL_DestroyTexture(), and SDL_DestroyWindowTexture().

int SDL_GetNumRenderDrivers ( void )

Get the number of 2D rendering drivers available for the current display.

A render driver is a set of code that handles rendering and texture management on a particular display. Normally there is only one, but some drivers may have several available with different capabilities.

See Also: SDL_GetRenderDriverInfo(); SDL_CreateRenderer()

Definition at line 78 of file SDL_render.c.

References SDL_arraysize.

Referenced by SDL_CreateRenderer(), SDL_CreateWindowTexture(), SDL_GetRenderDriverInfo(), and SDLTest_CommonInit().

int SDL_GetRenderDrawBlendMode	(	SDL_Renderer *	renderer,
		SDL_BlendMode *	blendMode
	)

Get the blend mode used for drawing operations.

Parameters

renderer	The renderer from which blend mode should be queried.
blendMode	A pointer filled in with the current blend mode.

Returns: 0 on success, or -1 on error

See Also: SDL_SetRenderDrawBlendMode()

Definition at line 1315 of file SDL_render.c.

References SDL_Renderer::blendMode, and CHECK_RENDERER_MAGIC.

int SDL_GetRenderDrawColor	(	SDL_Renderer *	renderer,
		Uint8 *	r,
		Uint8 *	g,
		Uint8 *	b,
		Uint8 *	a
	)

Get the color used for drawing operations (Rect, Line and Clear).

Parameters

renderer	The renderer from which drawing color should be queried.
r	A pointer to the red value used to draw on the rendering target.
g	A pointer to the green value used to draw on the rendering target.
b	A pointer to the blue value used to draw on the rendering target.
a	A pointer to the alpha value used to draw on the rendering target, usually SDL_ALPHA_OPAQUE (255).

Returns: 0 on success, or -1 on error

Definition at line 1285 of file SDL_render.c.

References SDL_Renderer::a, SDL_Renderer::b, CHECK_RENDERER_MAGIC, SDL_Renderer::g, and SDL_Renderer::r.

Referenced by SDLTest_DrawCharacter().

int SDL_GetRenderDriverInfo	(	int	index,
		SDL_RendererInfo *	info
	)

Get information about a specific 2D rendering driver for the current display.

Parameters

index	The index of the driver to query information about.
info	A pointer to an SDL_RendererInfo struct to be filled with information on the rendering driver.

Returns: 0 on success, -1 if the index was out of range.

See Also: SDL_CreateRenderer()

Definition at line 88 of file SDL_render.c.

References SDL_RenderDriver::info, SDL_GetNumRenderDrivers(), and SDL_SetError().

Referenced by SDL_CreateWindowTexture(), and SDLTest_CommonInit().

SDL_Renderer* SDL_GetRenderer ( SDL_Window * window )

Get the renderer associated with a window.

Definition at line 323 of file SDL_render.c.

References SDL_GetWindowData(), and SDL_WINDOWRENDERDATA.

Referenced by SDL_CreateRenderer().

int SDL_GetRendererInfo	(	SDL_Renderer *	renderer,
		SDL_RendererInfo *	info
	)

Get information about a rendering context.

Definition at line 329 of file SDL_render.c.

References CHECK_RENDERER_MAGIC, and SDL_Renderer::info.

Referenced by SDL_CreateWindowTexture(), and SDLTest_CommonInit().

int SDL_GetRendererOutputSize	(	SDL_Renderer *	renderer,
		int *	w,
		int *	h
	)

Get the output size of a rendering context.

Definition at line 338 of file SDL_render.c.

References CHECK_RENDERER_MAGIC, SDL_Renderer::GetOutputSize, NULL, SDL_GetWindowSize(), SDL_QueryTexture(), SDL_SetError(), SDL_Renderer::target, and SDL_Renderer::window.

Referenced by SDL_RenderSetViewport(), and UpdateLogicalSize().

SDL_Texture* SDL_GetRenderTarget ( SDL_Renderer * renderer )

Get the current render target or NULL for the default render target.

Returns: The current render target

See Also: SDL_SetRenderTarget()

Definition at line 1101 of file SDL_render.c.

References SDL_Renderer::target.

int SDL_GetTextureAlphaMod	(	SDL_Texture *	texture,
		Uint8 *	alpha
	)

Get the additional alpha value used in render copy operations.

Parameters

texture	The texture to query.
alpha	A pointer filled in with the current alpha value.

Returns: 0 on success, or -1 if the texture is not valid.

See Also: SDL_SetTextureAlphaMod()

Definition at line 652 of file SDL_render.c.

References SDL_Texture::a, and CHECK_TEXTURE_MAGIC.

int SDL_GetTextureBlendMode	(	SDL_Texture *	texture,
		SDL_BlendMode *	blendMode
	)

Get the blend mode used for texture copy operations.

Parameters

texture	The texture to query.
blendMode	A pointer filled in with the current blend mode.

Returns: 0 on success, or -1 if the texture is not valid.

See Also: SDL_SetTextureBlendMode()

Definition at line 681 of file SDL_render.c.

References SDL_Texture::blendMode, and CHECK_TEXTURE_MAGIC.

int SDL_GetTextureColorMod	(	SDL_Texture *	texture,
		Uint8 *	r,
		Uint8 *	g,
		Uint8 *	b
	)

Get the additional color value used in render copy operations.

Parameters

texture	The texture to query.
r	A pointer filled in with the current red color value.
g	A pointer filled in with the current green color value.
b	A pointer filled in with the current blue color value.

Returns: 0 on success, or -1 if the texture is not valid.

See Also: SDL_SetTextureColorMod()

Definition at line 611 of file SDL_render.c.

References SDL_Texture::b, CHECK_TEXTURE_MAGIC, SDL_Texture::g, and SDL_Texture::r.

int SDL_GL_BindTexture	(	SDL_Texture *	texture,
		float *	texw,
		float *	texh
	)

Bind the texture to the current OpenGL/ES/ES2 context for use with OpenGL instructions.

Parameters

texture	The SDL texture to bind
texw	A pointer to a float that will be filled with the texture width
texh	A pointer to a float that will be filled with the texture height

Returns: 0 on success, or -1 if the operation is not supported

Definition at line 1854 of file SDL_render.c.

References CHECK_TEXTURE_MAGIC, SDL_Renderer::GL_BindTexture, SDL_Texture::native, SDL_Texture::renderer, SDL_GL_BindTexture(), and SDL_Unsupported.

Referenced by SDL_GL_BindTexture().

int SDL_GL_UnbindTexture ( SDL_Texture * texture )

Unbind a texture from the current OpenGL/ES/ES2 context.

Parameters

texture The SDL texture to unbind

Returns: 0 on success, or -1 if the operation is not supported

Definition at line 1869 of file SDL_render.c.

References CHECK_TEXTURE_MAGIC, SDL_Renderer::GL_UnbindTexture, SDL_Texture::renderer, and SDL_Unsupported.

int SDL_LockTexture	(	SDL_Texture *	texture,
		const SDL_Rect *	rect,
		void **	pixels,
		int *	pitch
	)

Lock a portion of the texture for write-only pixel access.

Parameters

texture	The texture to lock for access, which was created with SDL_TEXTUREACCESS_STREAMING.
rect	A pointer to the rectangle to lock for access. If the rect is NULL, the entire texture will be locked.
pixels	This is filled in with a pointer to the locked pixels, appropriately offset by the locked area.
pitch	This is filled in with the pitch of the locked pixels.

Returns: 0 on success, or -1 if the texture is not valid or was not created with SDL_TEXTUREACCESS_STREAMING.

See Also: SDL_UnlockTexture()

Definition at line 932 of file SDL_render.c.

References SDL_Texture::access, CHECK_TEXTURE_MAGIC, SDL_Texture::h, SDL_Rect::h, SDL_Renderer::LockTexture, SDL_Texture::native, SDL_Texture::renderer, SDL_LockTextureNative(), SDL_LockTextureYUV(), SDL_SetError(), SDL_TEXTUREACCESS_STREAMING, SDL_Texture::w, SDL_Rect::w, SDL_Rect::x, SDL_Rect::y, and SDL_Texture::yuv.

Referenced by SDL_UnlockTextureNative(), SDL_UnlockTextureYUV(), SDL_UpdateTextureNative(), SDL_UpdateTextureYUV(), and SDL_UpdateTextureYUVPlanar().

static int SDL_LockTextureNative	(	SDL_Texture *	texture,
		const SDL_Rect *	rect,
		void **	pixels,
		int *	pitch
	)

static

Definition at line 920 of file SDL_render.c.

References SDL_Texture::format, SDL_Texture::locked_rect, SDL_Texture::pitch, SDL_Texture::pixels, SDL_BYTESPERPIXEL, SDL_Rect::x, and SDL_Rect::y.

Referenced by SDL_LockTexture().

static int SDL_LockTextureYUV	(	SDL_Texture *	texture,
		const SDL_Rect *	rect,
		void **	pixels,
		int *	pitch
	)

static

Definition at line 913 of file SDL_render.c.

References SDL_SW_LockYUVTexture(), and SDL_Texture::yuv.

Referenced by SDL_LockTexture().

int SDL_QueryTexture	(	SDL_Texture *	texture,
		Uint32 *	format,
		int *	access,
		int *	w,
		int *	h
	)

Query the attributes of a texture.

Parameters

texture	A texture to be queried.
format	A pointer filled in with the raw format of the texture. The actual format may differ, but pixel transfers will use this format.
access	A pointer filled in with the actual access to the texture.
w	A pointer filled in with the width of the texture in pixels.
h	A pointer filled in with the height of the texture in pixels.

Returns: 0 on success, or -1 if the texture is not valid.

Definition at line 565 of file SDL_render.c.

References SDL_Texture::access, CHECK_TEXTURE_MAGIC, SDL_Texture::format, SDL_Texture::h, and SDL_Texture::w.

Referenced by SDL_GetRendererOutputSize().

int SDL_RenderClear ( SDL_Renderer * renderer )

Clear the current rendering target with the drawing color.

This function clears the entire rendering target, ignoring the viewport.

Returns: 0 on success, or -1 on error

Definition at line 1324 of file SDL_render.c.

References CHECK_RENDERER_MAGIC, SDL_Renderer::hidden, and SDL_Renderer::RenderClear.

int SDL_RenderCopy	(	SDL_Renderer *	renderer,
		SDL_Texture *	texture,
		const SDL_Rect *	srcrect,
		const SDL_Rect *	dstrect
	)

Copy a portion of the texture to the current rendering target.

Parameters

renderer	The renderer which should copy parts of a texture.
texture	The source texture.
srcrect	A pointer to the source rectangle, or NULL for the entire texture.
dstrect	A pointer to the destination rectangle, or NULL for the entire rendering target.

Returns: 0 on success, or -1 on error

Definition at line 1634 of file SDL_render.c.

References CHECK_RENDERER_MAGIC, CHECK_TEXTURE_MAGIC, SDL_FRect::h, SDL_Texture::h, SDL_Rect::h, SDL_Renderer::hidden, SDL_Texture::native, SDL_Renderer::RenderCopy, SDL_Texture::renderer, SDL_Renderer::scale, SDL_HasIntersection(), SDL_IntersectRect(), SDL_RenderGetViewport(), SDL_SetError(), SDL_FRect::w, SDL_Texture::w, SDL_Rect::w, SDL_FPoint::x, SDL_FRect::x, SDL_Rect::x, SDL_FPoint::y, SDL_FRect::y, and SDL_Rect::y.

Referenced by SDL_UpdateWindowTexture(), and SDLTest_DrawCharacter().

int SDL_RenderCopyEx	(	SDL_Renderer *	renderer,
		SDL_Texture *	texture,
		const SDL_Rect *	srcrect,
		const SDL_Rect *	dstrect,
		const double	angle,
		const SDL_Point *	center,
		const SDL_RendererFlip	flip
	)

Copy a portion of the source texture to the current rendering target, rotating it by angle around the given center.

Parameters

renderer	The renderer which should copy parts of a texture.
texture	The source texture.
srcrect	A pointer to the source rectangle, or NULL for the entire texture.
dstrect	A pointer to the destination rectangle, or NULL for the entire rendering target.
angle	An angle in degrees that indicates the rotation that will be applied to dstrect
center	A pointer to a point indicating the point around which dstrect will be rotated (if NULL, rotation will be done aroud dstrect.w/2, dstrect.h/2)
flip	An SDL_RendererFlip value stating which flipping actions should be performed on the texture

Returns: 0 on success, or -1 on error

Definition at line 1687 of file SDL_render.c.

References CHECK_RENDERER_MAGIC, CHECK_TEXTURE_MAGIC, SDL_FRect::h, SDL_Texture::h, SDL_Rect::h, SDL_Texture::native, SDL_Renderer::RenderCopyEx, SDL_Texture::renderer, SDL_Renderer::scale, SDL_IntersectRect(), SDL_RenderGetViewport(), SDL_SetError(), SDL_FRect::w, SDL_Texture::w, SDL_Rect::w, SDL_FPoint::x, SDL_FRect::x, SDL_Point::x, SDL_Rect::x, SDL_FPoint::y, SDL_FRect::y, SDL_Point::y, and SDL_Rect::y.

int SDL_RenderDrawLine	(	SDL_Renderer *	renderer,
		int	x1,
		int	y1,
		int	x2,
		int	y2
	)

Draw a line on the current rendering target.

Parameters

renderer	The renderer which should draw a line.
x1	The x coordinate of the start point.
y1	The y coordinate of the start point.
x2	The x coordinate of the end point.
y2	The y coordinate of the end point.

Returns: 0 on success, or -1 on error

Definition at line 1413 of file SDL_render.c.

References SDL_RenderDrawLines(), SDL_Point::x, and SDL_Point::y.

int SDL_RenderDrawLines	(	SDL_Renderer *	renderer,
		const SDL_Point *	points,
		int	count
	)

Draw a series of connected lines on the current rendering target.

Parameters

renderer	The renderer which should draw multiple lines.
points	The points along the lines
count	The number of points, drawing count-1 lines

Returns: 0 on success, or -1 on error

Definition at line 1481 of file SDL_render.c.

References CHECK_RENDERER_MAGIC, SDL_Renderer::hidden, i, SDL_Renderer::RenderDrawLines, RenderDrawLinesWithRects(), SDL_Renderer::scale, SDL_OutOfMemory, SDL_SetError(), SDL_stack_alloc, SDL_stack_free, SDL_FPoint::x, SDL_Point::x, SDL_FPoint::y, and SDL_Point::y.

Referenced by SDL_RenderDrawLine(), and SDL_RenderDrawRect().

int SDL_RenderDrawPoint	(	SDL_Renderer *	renderer,
		int	x,
		int	y
	)

Draw a point on the current rendering target.

Parameters

renderer	The renderer which should draw a point.
x	The x coordinate of the point.
y	The y coordinate of the point.

Returns: 0 on success, or -1 on error

Definition at line 1336 of file SDL_render.c.

References SDL_RenderDrawPoints(), SDL_Point::x, and SDL_Point::y.

int SDL_RenderDrawPoints	(	SDL_Renderer *	renderer,
		const SDL_Point *	points,
		int	count
	)

Draw multiple points on the current rendering target.

Parameters

renderer	The renderer which should draw multiple points.
points	The points to draw
count	The number of points to draw

Returns: 0 on success, or -1 on error

Definition at line 1372 of file SDL_render.c.

References CHECK_RENDERER_MAGIC, SDL_Renderer::hidden, i, SDL_Renderer::RenderDrawPoints, RenderDrawPointsWithRects(), SDL_Renderer::scale, SDL_OutOfMemory, SDL_SetError(), SDL_stack_alloc, SDL_stack_free, SDL_FPoint::x, SDL_Point::x, SDL_FPoint::y, and SDL_Point::y.

Referenced by SDL_RenderDrawPoint().

int SDL_RenderDrawRect	(	SDL_Renderer *	renderer,
		const SDL_Rect *	rect
	)

Draw a rectangle on the current rendering target.

Parameters

renderer	The renderer which should draw a rectangle.
rect	A pointer to the destination rectangle, or NULL to outline the entire rendering target.

Returns: 0 on success, or -1 on error

Definition at line 1522 of file SDL_render.c.

References CHECK_RENDERER_MAGIC, SDL_Rect::h, SDL_RenderDrawLines(), SDL_RenderGetViewport(), SDL_Rect::w, SDL_Point::x, SDL_Rect::x, SDL_Point::y, and SDL_Rect::y.

Referenced by SDL_RenderDrawRects().

int SDL_RenderDrawRects	(	SDL_Renderer *	renderer,
		const SDL_Rect *	rects,
		int	count
	)

Draw some number of rectangles on the current rendering target.

Parameters

renderer	The renderer which should draw multiple rectangles.
rects	A pointer to an array of destination rectangles.
count	The number of rectangles.

Returns: 0 on success, or -1 on error

Definition at line 1551 of file SDL_render.c.

References CHECK_RENDERER_MAGIC, SDL_Renderer::hidden, i, SDL_RenderDrawRect(), and SDL_SetError().

static int SDL_RendererEventWatch	(	void *	userdata,
		SDL_Event *	event
	)

static

Definition at line 103 of file SDL_render.c.

References SDL_Event::button, SDL_WindowEvent::event, SDL_Renderer::GetOutputSize, SDL_Rect::h, SDL_Renderer::hidden, int, SDL_Renderer::logical_w, SDL_Event::motion, SDL_Renderer::scale, SDL_FALSE, SDL_GetWindowFlags(), SDL_GetWindowFromID(), SDL_GetWindowSize(), SDL_max, SDL_min, SDL_MOUSEBUTTONDOWN, SDL_MOUSEBUTTONUP, SDL_MOUSEMOTION, SDL_TRUE, SDL_WINDOW_HIDDEN, SDL_WINDOW_MINIMIZED, SDL_WINDOWEVENT, SDL_WINDOWEVENT_HIDDEN, SDL_WINDOWEVENT_MINIMIZED, SDL_WINDOWEVENT_RESTORED, SDL_WINDOWEVENT_SHOWN, SDL_WINDOWEVENT_SIZE_CHANGED, SDL_Renderer::target, SDL_Event::type, UpdateLogicalSize(), SDL_Renderer::UpdateViewport, SDL_Renderer::viewport, SDL_Renderer::viewport_backup, SDL_Rect::w, SDL_Renderer::window, SDL_Event::window, SDL_Renderer::WindowEvent, SDL_WindowEvent::windowID, SDL_FPoint::x, SDL_Rect::x, SDL_MouseMotionEvent::x, SDL_MouseButtonEvent::x, SDL_MouseMotionEvent::xrel, SDL_FPoint::y, SDL_Rect::y, SDL_MouseMotionEvent::y, SDL_MouseButtonEvent::y, and SDL_MouseMotionEvent::yrel.

Referenced by SDL_CreateRenderer(), and SDL_DestroyRenderer().

int SDL_RenderFillRect	(	SDL_Renderer *	renderer,
		const SDL_Rect *	rect
	)

Fill a rectangle on the current rendering target with the drawing color.

Parameters

renderer	The renderer which should fill a rectangle.
rect	A pointer to the destination rectangle, or NULL for the entire rendering target.

Returns: 0 on success, or -1 on error

Definition at line 1578 of file SDL_render.c.

References CHECK_RENDERER_MAGIC, SDL_RenderFillRects(), SDL_RenderGetViewport(), SDL_Rect::x, and SDL_Rect::y.

int SDL_RenderFillRects	(	SDL_Renderer *	renderer,
		const SDL_Rect *	rects,
		int	count
	)

Fill some number of rectangles on the current rendering target with the drawing color.

Parameters

renderer	The renderer which should fill multiple rectangles.
rects	A pointer to an array of destination rectangles.
count	The number of rectangles.

Returns: 0 on success, or -1 on error

Definition at line 1595 of file SDL_render.c.

References CHECK_RENDERER_MAGIC, SDL_FRect::h, SDL_Rect::h, SDL_Renderer::hidden, i, SDL_Renderer::RenderFillRects, SDL_Renderer::scale, SDL_OutOfMemory, SDL_SetError(), SDL_stack_alloc, SDL_stack_free, SDL_FRect::w, SDL_Rect::w, SDL_FPoint::x, SDL_FRect::x, SDL_Rect::x, SDL_FPoint::y, SDL_FRect::y, and SDL_Rect::y.

Referenced by SDL_RenderFillRect().

void SDL_RenderGetClipRect	(	SDL_Renderer *	renderer,
		SDL_Rect *	rect
	)

Get the clip rectangle for the current target.

Parameters

renderer	The renderer from which clip rectangle should be queried.
rect	A pointer filled in with the current clip rectangle, or an empty rectangle if clipping is disabled.

See Also: SDL_RenderSetClipRect()

Definition at line 1236 of file SDL_render.c.

References CHECK_RENDERER_MAGIC, SDL_Renderer::clip_rect, SDL_Rect::h, int, SDL_Renderer::scale, SDL_Rect::w, SDL_FPoint::x, SDL_Rect::x, SDL_FPoint::y, and SDL_Rect::y.

Referenced by SDLTest_CommonEvent().

void SDL_RenderGetLogicalSize	(	SDL_Renderer *	renderer,
		int *	w,
		int *	h
	)

Get device independent resolution for rendering.

Parameters

renderer	The renderer from which resolution should be queried.
w	A pointer filled with the width of the logical resolution
h	A pointer filled with the height of the logical resolution

See Also: SDL_RenderSetLogicalSize()

Definition at line 1174 of file SDL_render.c.

References CHECK_RENDERER_MAGIC, SDL_Renderer::logical_h, and SDL_Renderer::logical_w.

void SDL_RenderGetScale	(	SDL_Renderer *	renderer,
		float *	scaleX,
		float *	scaleY
	)

Get the drawing scale for the current target.

Parameters

renderer	The renderer from which drawing scale should be queried.
scaleX	A pointer filled in with the horizontal scaling factor
scaleY	A pointer filled in with the vertical scaling factor

See Also: SDL_RenderSetScale()

Definition at line 1259 of file SDL_render.c.

References CHECK_RENDERER_MAGIC, SDL_Renderer::scale, SDL_FPoint::x, and SDL_FPoint::y.

void SDL_RenderGetViewport	(	SDL_Renderer *	renderer,
		SDL_Rect *	rect
	)

Get the drawing area for the current target.

See Also: SDL_RenderSetViewport()

Definition at line 1207 of file SDL_render.c.

References CHECK_RENDERER_MAGIC, SDL_Rect::h, int, SDL_Renderer::scale, SDL_Renderer::viewport, SDL_Rect::w, SDL_FPoint::x, SDL_Rect::x, SDL_FPoint::y, and SDL_Rect::y.

Referenced by SDL_RenderCopy(), SDL_RenderCopyEx(), SDL_RenderDrawRect(), SDL_RenderFillRect(), and SDLTest_ScreenShot().

void SDL_RenderPresent ( SDL_Renderer * renderer )

Update the screen with rendering performed.

Definition at line 1785 of file SDL_render.c.

References CHECK_RENDERER_MAGIC, SDL_Renderer::hidden, and SDL_Renderer::RenderPresent.

Referenced by SDL_UpdateWindowTexture().

int SDL_RenderReadPixels	(	SDL_Renderer *	renderer,
		const SDL_Rect *	rect,
		Uint32	format,
		void *	pixels,
		int	pitch
	)

Read pixels from the current rendering target.

Parameters

renderer	The renderer from which pixels should be read.
rect	A pointer to the rectangle to read, or NULL for the entire render target.
format	The desired format of the pixel data, or 0 to use the format of the rendering target
pixels	A pointer to be filled in with the pixel data
pitch	The pitch of the pixels parameter.

Returns: 0 on success, or -1 if pixel reading is not supported.

Warning: This is a very slow operation, and should not be used frequently.

Definition at line 1748 of file SDL_render.c.

References CHECK_RENDERER_MAGIC, SDL_Rect::h, SDL_Renderer::RenderReadPixels, SDL_BYTESPERPIXEL, SDL_GetWindowPixelFormat(), SDL_IntersectRect(), SDL_Unsupported, SDL_Renderer::viewport, SDL_Rect::w, SDL_Renderer::window, SDL_Rect::x, and SDL_Rect::y.

Referenced by SDLTest_ScreenShot().

int SDL_RenderSetClipRect	(	SDL_Renderer *	renderer,
		const SDL_Rect *	rect
	)

Set the clip rectangle for the current target.

Parameters

renderer	The renderer for which clip rectangle should be set.
rect	A pointer to the rectangle to set as the clip rectangle, or NULL to disable clipping.

Returns: 0 on success, or -1 on error

See Also: SDL_RenderGetClipRect()

Definition at line 1220 of file SDL_render.c.

References CHECK_RENDERER_MAGIC, SDL_Renderer::clip_rect, SDL_Rect::h, int, SDL_Renderer::scale, SDL_ceil(), SDL_floor(), SDL_zero, SDL_Renderer::UpdateClipRect, SDL_Rect::w, SDL_FPoint::x, SDL_Rect::x, SDL_FPoint::y, and SDL_Rect::y.

Referenced by SDLTest_CommonEvent().

int SDL_RenderSetLogicalSize	(	SDL_Renderer *	renderer,
		int	w,
		int	h
	)

Set device independent resolution for rendering.

Parameters

renderer	The renderer for which resolution should be set.
w	The width of the logical resolution
h	The height of the logical resolution

This function uses the viewport and scaling functionality to allow a fixed logical resolution for rendering, regardless of the actual output resolution. If the actual output resolution doesn't have the same aspect ratio the output rendering will be centered within the output display.

If the output display is a window, mouse events in the window will be filtered and scaled so they seem to arrive within the logical resolution.

Note: If this function results in scaling or subpixel drawing by the rendering backend, it will be handled using the appropriate quality hints.

See Also: SDL_RenderGetLogicalSize(); SDL_RenderSetScale(); SDL_RenderSetViewport()

Definition at line 1154 of file SDL_render.c.

References CHECK_RENDERER_MAGIC, SDL_Renderer::logical_h, SDL_Renderer::logical_w, NULL, SDL_RenderSetScale(), SDL_RenderSetViewport(), and UpdateLogicalSize().

Referenced by SDLTest_CommonInit().

int SDL_RenderSetScale	(	SDL_Renderer *	renderer,
		float	scaleX,
		float	scaleY
	)

Set the drawing scale for rendering on the current target.

Parameters

renderer	The renderer for which the drawing scale should be set.
scaleX	The horizontal scaling factor
scaleY	The vertical scaling factor

The drawing coordinates are scaled by the x/y scaling factors before they are used by the renderer. This allows resolution independent drawing with a single coordinate system.

Note: If this results in scaling or subpixel drawing by the rendering backend, it will be handled using the appropriate quality hints. For best results use integer scaling factors.

See Also: SDL_RenderGetScale(); SDL_RenderSetLogicalSize()

Definition at line 1249 of file SDL_render.c.

References CHECK_RENDERER_MAGIC, SDL_Renderer::scale, SDL_FPoint::x, and SDL_FPoint::y.

Referenced by SDL_RenderSetLogicalSize(), SDLTest_CommonInit(), and UpdateLogicalSize().

int SDL_RenderSetViewport	(	SDL_Renderer *	renderer,
		const SDL_Rect *	rect
	)

Set the drawing area for rendering on the current target.

Parameters

renderer	The renderer for which the drawing area should be set.
rect	The rectangle representing the drawing area, or NULL to set the viewport to the entire target.

The x,y of the viewport rect represents the origin for rendering.

Returns: 0 on success, or -1 on error

Note: If the window associated with the renderer is resized, the viewport is automatically reset.

See Also: SDL_RenderGetViewport(); SDL_RenderSetLogicalSize()

Definition at line 1187 of file SDL_render.c.

References CHECK_RENDERER_MAGIC, SDL_Rect::h, int, SDL_Renderer::scale, SDL_ceil(), SDL_floor(), SDL_GetRendererOutputSize(), SDL_Renderer::UpdateViewport, SDL_Renderer::viewport, SDL_Rect::w, SDL_FPoint::x, SDL_Rect::x, SDL_FPoint::y, and SDL_Rect::y.

Referenced by SDL_CreateRenderer(), SDL_CreateSoftwareRenderer(), SDL_CreateWindowTexture(), SDL_RenderSetLogicalSize(), and UpdateLogicalSize().

SDL_bool SDL_RenderTargetSupported ( SDL_Renderer * renderer )

Determines whether a window supports the use of render targets.

Parameters

renderer The renderer that will be checked

Returns: SDL_TRUE if supported, SDL_FALSE if not.

Definition at line 1025 of file SDL_render.c.

References SDL_RendererInfo::flags, SDL_Renderer::info, SDL_FALSE, SDL_RENDERER_TARGETTEXTURE, and SDL_Renderer::SetRenderTarget.

Referenced by SDL_SetRenderTarget().

int SDL_SetRenderDrawBlendMode	(	SDL_Renderer *	renderer,
		SDL_BlendMode	blendMode
	)

Set the blend mode used for drawing operations (Fill and Line).

Parameters

renderer	The renderer for which blend mode should be set.
blendMode	SDL_BlendMode to use for blending.

Returns: 0 on success, or -1 on error

Note: If the blend mode is not supported, the closest supported mode is chosen.

See Also: SDL_GetRenderDrawBlendMode()

Definition at line 1306 of file SDL_render.c.

References SDL_Renderer::blendMode, and CHECK_RENDERER_MAGIC.

int SDL_SetRenderDrawColor	(	SDL_Renderer *	renderer,
		Uint8	r,
		Uint8	g,
		Uint8	b,
		Uint8	a
	)

Set the color used for drawing operations (Rect, Line and Clear).

Parameters

renderer	The renderer for which drawing color should be set.
r	The red value used to draw on the rendering target.
g	The green value used to draw on the rendering target.
b	The blue value used to draw on the rendering target.
a	The alpha value used to draw on the rendering target, usually SDL_ALPHA_OPAQUE (255).

Returns: 0 on success, or -1 on error

Definition at line 1272 of file SDL_render.c.

References SDL_Renderer::a, SDL_Renderer::b, CHECK_RENDERER_MAGIC, SDL_Renderer::g, and SDL_Renderer::r.

int SDL_SetRenderTarget	(	SDL_Renderer *	renderer,
		SDL_Texture *	texture
	)

Set a texture as the current rendering target.

Parameters

renderer	The renderer.
texture	The targeted texture, which must be created with the SDL_TEXTUREACCESS_TARGET flag, or NULL for the default render target

Returns: 0 on success, or -1 on error

See Also: SDL_GetRenderTarget()

Definition at line 1034 of file SDL_render.c.

References SDL_Texture::access, CHECK_TEXTURE_MAGIC, SDL_Renderer::clip_rect, SDL_Renderer::clip_rect_backup, SDL_Texture::h, SDL_Rect::h, SDL_Renderer::logical_h, SDL_Renderer::logical_h_backup, SDL_Renderer::logical_w, SDL_Renderer::logical_w_backup, SDL_Texture::native, SDL_Texture::renderer, SDL_Renderer::scale, SDL_Renderer::scale_backup, SDL_RenderTargetSupported(), SDL_SetError(), SDL_TEXTUREACCESS_TARGET, SDL_Unsupported, SDL_Renderer::SetRenderTarget, SDL_Renderer::target, SDL_Renderer::UpdateClipRect, SDL_Renderer::UpdateViewport, SDL_Renderer::viewport, SDL_Renderer::viewport_backup, SDL_Texture::w, SDL_Rect::w, SDL_FPoint::x, SDL_Rect::x, SDL_FPoint::y, and SDL_Rect::y.

Referenced by SDL_DestroyTexture().

int SDL_SetTextureAlphaMod	(	SDL_Texture *	texture,
		Uint8	alpha
	)

Set an additional alpha value used in render copy operations.

Parameters

texture	The texture to update.
alpha	The alpha value multiplied into copy operations.

Returns: 0 on success, or -1 if the texture is not valid or alpha modulation is not supported.

See Also: SDL_GetTextureAlphaMod()

Definition at line 629 of file SDL_render.c.

References SDL_Texture::a, CHECK_TEXTURE_MAGIC, SDL_Texture::modMode, SDL_Texture::native, SDL_Texture::renderer, SDL_SetTextureAlphaMod(), SDL_TEXTUREMODULATE_ALPHA, and SDL_Renderer::SetTextureAlphaMod.

Referenced by SDL_CreateTextureFromSurface(), SDL_SetTextureAlphaMod(), and SDLTest_DrawCharacter().

int SDL_SetTextureBlendMode	(	SDL_Texture *	texture,
		SDL_BlendMode	blendMode
	)

Set the blend mode used for texture copy operations.

Parameters

texture	The texture to update.
blendMode	SDL_BlendMode to use for texture blending.

Returns: 0 on success, or -1 if the texture is not valid or the blend mode is not supported.

Note: If the blend mode is not supported, the closest supported mode is chosen.

See Also: SDL_GetTextureBlendMode()

Definition at line 663 of file SDL_render.c.

References SDL_Texture::blendMode, CHECK_TEXTURE_MAGIC, SDL_Texture::native, SDL_Texture::renderer, SDL_SetTextureBlendMode(), and SDL_Renderer::SetTextureBlendMode.

Referenced by SDL_CreateTextureFromSurface(), and SDL_SetTextureBlendMode().

int SDL_SetTextureColorMod	(	SDL_Texture *	texture,
		Uint8	r,
		Uint8	g,
		Uint8	b
	)

Set an additional color value used in render copy operations.

Parameters

texture	The texture to update.
r	The red color value multiplied into copy operations.
g	The green color value multiplied into copy operations.
b	The blue color value multiplied into copy operations.

Returns: 0 on success, or -1 if the texture is not valid or color modulation is not supported.

See Also: SDL_GetTextureColorMod()

Definition at line 586 of file SDL_render.c.

References SDL_Texture::b, CHECK_TEXTURE_MAGIC, SDL_Texture::g, SDL_Texture::modMode, SDL_Texture::native, SDL_Texture::r, SDL_Texture::renderer, SDL_SetTextureColorMod(), SDL_TEXTUREMODULATE_COLOR, and SDL_Renderer::SetTextureColorMod.

Referenced by SDL_CreateTextureFromSurface(), SDL_SetTextureColorMod(), and SDLTest_DrawCharacter().

void SDL_UnlockTexture ( SDL_Texture * texture )

Unlock a texture, uploading the changes to video memory, if needed.

See Also: SDL_LockTexture()

Definition at line 1005 of file SDL_render.c.

References SDL_Texture::access, CHECK_TEXTURE_MAGIC, SDL_Texture::native, SDL_Texture::renderer, SDL_TEXTUREACCESS_STREAMING, SDL_UnlockTextureNative(), SDL_UnlockTextureYUV(), SDL_Renderer::UnlockTexture, and SDL_Texture::yuv.

Referenced by SDL_UnlockTextureNative(), SDL_UnlockTextureYUV(), SDL_UpdateTextureNative(), SDL_UpdateTextureYUV(), and SDL_UpdateTextureYUVPlanar().

static void SDL_UnlockTextureNative ( SDL_Texture * texture )

static

Definition at line 984 of file SDL_render.c.

References SDL_Texture::format, SDL_Rect::h, SDL_Texture::locked_rect, SDL_Texture::native, SDL_Texture::pitch, SDL_Texture::pixels, SDL_BYTESPERPIXEL, SDL_ConvertPixels(), SDL_LockTexture(), SDL_UnlockTexture(), SDL_Rect::w, SDL_Rect::x, and SDL_Rect::y.

Referenced by SDL_UnlockTexture().

static void SDL_UnlockTextureYUV ( SDL_Texture * texture )

static

Definition at line 963 of file SDL_render.c.

References SDL_Texture::format, SDL_Texture::h, SDL_Rect::h, SDL_Texture::native, SDL_LockTexture(), SDL_SW_CopyYUVToRGB(), SDL_UnlockTexture(), SDL_Texture::w, SDL_Rect::w, SDL_Rect::x, SDL_Rect::y, and SDL_Texture::yuv.

Referenced by SDL_UnlockTexture().

int SDL_UpdateTexture	(	SDL_Texture *	texture,
		const SDL_Rect *	rect,
		const void *	pixels,
		int	pitch
	)

Update the given texture rectangle with new pixel data.

Parameters

texture	The texture to update
rect	A pointer to the rectangle of pixels to update, or NULL to update the entire texture.
pixels	The raw pixel data.
pitch	The number of bytes between rows of pixel data.

Returns: 0 on success, or -1 if the texture is not valid.

Note: This is a fairly slow function.

Definition at line 775 of file SDL_render.c.

References CHECK_TEXTURE_MAGIC, SDL_Texture::h, SDL_Rect::h, SDL_Texture::native, SDL_Texture::renderer, SDL_InvalidParamError, SDL_UpdateTextureNative(), SDL_UpdateTextureYUV(), SDL_Renderer::UpdateTexture, SDL_Texture::w, SDL_Rect::w, SDL_Rect::x, SDL_Rect::y, and SDL_Texture::yuv.

Referenced by SDL_CreateTextureFromSurface(), SDL_UpdateTextureNative(), SDL_UpdateTextureYUV(), SDL_UpdateTextureYUVPlanar(), and SDL_UpdateWindowTexture().

static int SDL_UpdateTextureNative	(	SDL_Texture *	texture,
		const SDL_Rect *	rect,
		const void *	pixels,
		int	pitch
	)

static

Definition at line 738 of file SDL_render.c.

References SDL_Texture::access, SDL_Texture::format, SDL_Rect::h, SDL_Texture::native, SDL_BYTESPERPIXEL, SDL_ConvertPixels(), SDL_free(), SDL_LockTexture(), SDL_malloc(), SDL_OutOfMemory, SDL_TEXTUREACCESS_STREAMING, SDL_UnlockTexture(), SDL_UpdateTexture(), and SDL_Rect::w.

Referenced by SDL_UpdateTexture().

static int SDL_UpdateTextureYUV	(	SDL_Texture *	texture,
		const SDL_Rect *	rect,
		const void *	pixels,
		int	pitch
	)

static

Definition at line 692 of file SDL_render.c.

References SDL_Texture::access, SDL_Texture::format, SDL_Texture::h, SDL_Rect::h, SDL_Texture::native, SDL_BYTESPERPIXEL, SDL_free(), SDL_LockTexture(), SDL_malloc(), SDL_OutOfMemory, SDL_SW_CopyYUVToRGB(), SDL_SW_UpdateYUVTexture(), SDL_TEXTUREACCESS_STREAMING, SDL_UnlockTexture(), SDL_UpdateTexture(), SDL_Texture::w, SDL_Rect::w, SDL_Rect::x, SDL_Rect::y, and SDL_Texture::yuv.

Referenced by SDL_UpdateTexture().

static int SDL_UpdateTextureYUVPlanar	(	SDL_Texture *	texture,
		const SDL_Rect *	rect,
		const Uint8 *	Yplane,
		int	Ypitch,
		const Uint8 *	Uplane,
		int	Upitch,
		const Uint8 *	Vplane,
		int	Vpitch
	)

static

Definition at line 809 of file SDL_render.c.

References SDL_Texture::access, SDL_Texture::format, SDL_Texture::h, SDL_Rect::h, SDL_Texture::native, SDL_BYTESPERPIXEL, SDL_free(), SDL_LockTexture(), SDL_malloc(), SDL_OutOfMemory, SDL_SW_CopyYUVToRGB(), SDL_SW_UpdateYUVTexturePlanar(), SDL_TEXTUREACCESS_STREAMING, SDL_UnlockTexture(), SDL_UpdateTexture(), SDL_Texture::w, SDL_Rect::w, SDL_Rect::x, SDL_Rect::y, and SDL_Texture::yuv.

Referenced by SDL_UpdateYUVTexture().

int SDL_UpdateYUVTexture	(	SDL_Texture *	texture,
		const SDL_Rect *	rect,
		const Uint8 *	Yplane,
		int	Ypitch,
		const Uint8 *	Uplane,
		int	Upitch,
		const Uint8 *	Vplane,
		int	Vpitch
	)

Update a rectangle within a planar YV12 or IYUV texture with new pixel data.

Parameters

texture	The texture to update
rect	A pointer to the rectangle of pixels to update, or NULL to update the entire texture.
Yplane	The raw pixel data for the Y plane.
Ypitch	The number of bytes between rows of pixel data for the Y plane.
Uplane	The raw pixel data for the U plane.
Upitch	The number of bytes between rows of pixel data for the U plane.
Vplane	The raw pixel data for the V plane.
Vpitch	The number of bytes between rows of pixel data for the V plane.

Returns: 0 on success, or -1 if the texture is not valid.

Note: You can use SDL_UpdateTexture() as long as your pixel data is a contiguous block of Y and U/V planes in the proper order, but this function is available if your pixel data is not contiguous.

Definition at line 856 of file SDL_render.c.

References CHECK_TEXTURE_MAGIC, SDL_Texture::format, SDL_Texture::h, SDL_Rect::h, SDL_Texture::native, SDL_Texture::renderer, SDL_assert, SDL_InvalidParamError, SDL_PIXELFORMAT_IYUV, SDL_PIXELFORMAT_YV12, SDL_SetError(), SDL_Unsupported, SDL_UpdateTextureYUVPlanar(), SDL_Renderer::UpdateTextureYUV, SDL_Texture::w, SDL_Rect::w, SDL_Rect::x, SDL_Rect::y, and SDL_Texture::yuv.