s_blit.c File Reference

#include "main/glheader.h"
#include "main/image.h"
#include "main/macros.h"
#include "s_context.h"

Defines
#define	ABS(X)   ((X) < 0 ? -(X) : (X))
#define	RESAMPLE(NAME, PIXELTYPE, SIZE)
	Generate a row resampler function for GL_NEAREST mode.
#define	LERP(T, A, B)   ( (A) + (T) * ((B) - (A)) )
Functions
static void	blit_nearest (GLcontext *ctx, GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1, GLint dstX0, GLint dstY0, GLint dstX1, GLint dstY1, GLbitfield buffer)
	Resamplers for 1, 2, 4, 8 and 16-byte pixels.
static INLINE GLfloat	lerp_2d (GLfloat a, GLfloat b, GLfloat v00, GLfloat v10, GLfloat v01, GLfloat v11)
static void	resample_linear_row_ub (GLint srcWidth, GLint dstWidth, const GLvoid *srcBuffer0, const GLvoid *srcBuffer1, GLvoid *dstBuffer, GLboolean flip, GLfloat rowWeight)
	Bilinear interpolation of two source rows.
static void	blit_linear (GLcontext *ctx, GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1, GLint dstX0, GLint dstY0, GLint dstX1, GLint dstY1)
	Bilinear filtered blit (color only).
static void	simple_blit (GLcontext *ctx, GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1, GLint dstX0, GLint dstY0, GLint dstX1, GLint dstY1, GLbitfield buffer)
	Simple case: Blit color, depth or stencil with no scaling or flipping.
void	_swrast_BlitFramebuffer (GLcontext *ctx, GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1, GLint dstX0, GLint dstY0, GLint dstX1, GLint dstY1, GLbitfield mask, GLenum filter)
	Software fallback for glBlitFramebufferEXT().

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Define Documentation

#define ABS

(

X

)

((X) < 0 ? -(X) : (X))

#define LERP	(	T,
		A,
		B		)	( (A) + (T) * ((B) - (A)) )

#define RESAMPLE	(	NAME,
		PIXELTYPE,
		SIZE		)

Generate a row resampler function for GL_NEAREST mode.

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Function Documentation

void _swrast_BlitFramebuffer	(	GLcontext *	ctx,
		GLint	srcX0,
		GLint	srcY0,
		GLint	srcX1,
		GLint	srcY1,
		GLint	dstX0,
		GLint	dstY0,
		GLint	dstX1,
		GLint	dstY1,
		GLbitfield	mask,
		GLenum	filter
	)

Software fallback for glBlitFramebufferEXT().

static void blit_linear	(	GLcontext *	ctx,
		GLint	srcX0,
		GLint	srcY0,
		GLint	srcX1,
		GLint	srcY1,
		GLint	dstX0,
		GLint	dstY0,
		GLint	dstX1,
		GLint	dstY1
	)			[static]

Bilinear filtered blit (color only).

static void blit_nearest	(	GLcontext *	ctx,
		GLint	srcX0,
		GLint	srcY0,
		GLint	srcX1,
		GLint	srcY1,
		GLint	dstX0,
		GLint	dstY0,
		GLint	dstX1,
		GLint	dstY1,
		GLbitfield	buffer
	)			[static]

Resamplers for 1, 2, 4, 8 and 16-byte pixels.

Blit color, depth or stencil with GL_NEAREST filtering.

static INLINE GLfloat lerp_2d	(	GLfloat	a,
		GLfloat	b,
		GLfloat	v00,
		GLfloat	v10,
		GLfloat	v01,
		GLfloat	v11
	)			[static]

static void resample_linear_row_ub	(	GLint	srcWidth,
		GLint	dstWidth,
		const GLvoid *	srcBuffer0,
		const GLvoid *	srcBuffer1,
		GLvoid *	dstBuffer,
		GLboolean	flip,
		GLfloat	rowWeight
	)			[static]

Bilinear interpolation of two source rows.

GLubyte pixels.

static void simple_blit	(	GLcontext *	ctx,
		GLint	srcX0,
		GLint	srcY0,
		GLint	srcX1,
		GLint	srcY1,
		GLint	dstX0,
		GLint	dstY0,
		GLint	dstX1,
		GLint	dstY1,
		GLbitfield	buffer
	)			[static]

Simple case: Blit color, depth or stencil with no scaling or flipping.

XXX we could easily support vertical flipping here.

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