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intel: add GL_EXT_framebuffer blit extension 

This functionality is required by GL_ARB_framebuffer_object.
For now, implement it in terms of glCopyPixels().  This will need to be
revisted though.
This commit is contained in:
Brian Paul 2009-01-22 15:43:40 -07:00
parent f8a7e497ac
commit 6d2e1f6a2c
2 changed files with 74 additions and 2 deletions
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6
src/mesa/drivers/dri/intel/intel_context.c
View File

@ -84,6 +84,7 @@ int INTEL_DEBUG = (0);
#define need_GL_EXT_cull_vertex
#define need_GL_EXT_fog_coord
#define need_GL_EXT_framebuffer_object
#define need_GL_EXT_framebuffer_blit
#define need_GL_EXT_multi_draw_arrays
#define need_GL_EXT_point_parameters
#define need_GL_EXT_secondary_color
@ -421,8 +422,9 @@ static const struct dri_extension arb_oq_extensions[] = {
};
static const struct dri_extension ttm_extensions[] = {
{ "GL_ARB_pixel_buffer_object", NULL },
{ "GL_EXT_framebuffer_object", GL_EXT_framebuffer_object_functions },
{ "GL_ARB_pixel_buffer_object", NULL },
{ "GL_EXT_framebuffer_blit", GL_EXT_framebuffer_blit_functions },
{ "GL_EXT_framebuffer_object", GL_EXT_framebuffer_object_functions },
{ NULL, NULL }
};

70
src/mesa/drivers/dri/intel/intel_fbo.c
View File

@ -27,6 +27,7 @@
#include "main/imports.h"
#include "main/macros.h"
#include "main/mtypes.h"
#include "main/fbobject.h"
#include "main/framebuffer.h"
@ -636,6 +637,74 @@ intel_validate_framebuffer(GLcontext *ctx, struct gl_framebuffer *fb)
}
/**
* Called from glBlitFramebuffer().
* For now, we're doing an approximation with glCopyPixels().
* XXX we need to bypass all the per-fragment operations, except scissor.
*/
static void
intel_blit_framebuffer(GLcontext *ctx,
GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1,
GLint dstX0, GLint dstY0, GLint dstX1, GLint dstY1,
GLbitfield mask, GLenum filter)
{
const GLfloat xZoomSave = ctx->Pixel.ZoomX;
const GLfloat yZoomSave = ctx->Pixel.ZoomY;
GLsizei width, height;
GLfloat xFlip = 1.0F, yFlip = 1.0F;
if (srcX1 < srcX0) {
GLint tmp = srcX1;
srcX1 = srcX0;
srcX0 = tmp;
xFlip = -1.0F;
}
if (srcY1 < srcY0) {
GLint tmp = srcY1;
srcY1 = srcY0;
srcY0 = tmp;
yFlip = -1.0F;
}
width = srcX1 - srcX0;
height = srcY1 - srcY0;
ctx->Pixel.ZoomX = xFlip * (dstX1 - dstX0) / (srcX1 - srcY0);
ctx->Pixel.ZoomY = yFlip * (dstY1 - dstY0) / (srcY1 - srcY0);
if (ctx->Pixel.ZoomX < 0.0F) {
dstX0 = MAX2(dstX0, dstX1);
}
else {
dstX0 = MIN2(dstX0, dstX1);
}
if (ctx->Pixel.ZoomY < 0.0F) {
dstY0 = MAX2(dstY0, dstY1);
}
else {
dstY0 = MIN2(dstY0, dstY1);
}
if (mask & GL_COLOR_BUFFER_BIT) {
ctx->Driver.CopyPixels(ctx, srcX0, srcY0, width, height,
dstX0, dstY0, GL_COLOR);
}
if (mask & GL_DEPTH_BUFFER_BIT) {
ctx->Driver.CopyPixels(ctx, srcX0, srcY0, width, height,
dstX0, dstY0, GL_DEPTH);
}
if (mask & GL_STENCIL_BUFFER_BIT) {
ctx->Driver.CopyPixels(ctx, srcX0, srcY0, width, height,
dstX0, dstY0, GL_STENCIL);
}
ctx->Pixel.ZoomX = xZoomSave;
ctx->Pixel.ZoomY = yZoomSave;
}
/**
* Do one-time context initializations related to GL_EXT_framebuffer_object.
* Hook in device driver functions.
@ -651,4 +720,5 @@ intel_fbo_init(struct intel_context *intel)
intel->ctx.Driver.FinishRenderTexture = intel_finish_render_texture;
intel->ctx.Driver.ResizeBuffers = intel_resize_buffers;
intel->ctx.Driver.ValidateFramebuffer = intel_validate_framebuffer;
intel->ctx.Driver.BlitFramebuffer = intel_blit_framebuffer;
}