Module: Mesa Branch: arb_fbo Commit: 132403ce44a1dea4390293a4b6057858b731bbcb URL: http://cgit.freedesktop.org/mesa/mesa/commit/?id=132403ce44a1dea4390293a4b6057858b731bbcb
Author: Brian Paul <[email protected]> Date: Thu Jan 22 14:13:00 2009 -0700 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. --- src/mesa/drivers/dri/intel/intel_context.c | 6 ++- src/mesa/drivers/dri/intel/intel_fbo.c | 54 ++++++++++++++++++++++++++++ 2 files changed, 58 insertions(+), 2 deletions(-) diff --git a/src/mesa/drivers/dri/intel/intel_context.c b/src/mesa/drivers/dri/intel/intel_context.c index b63e6f7..5255c07 100644 --- a/src/mesa/drivers/dri/intel/intel_context.c +++ b/src/mesa/drivers/dri/intel/intel_context.c @@ -85,6 +85,7 @@ 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 @@ -423,8 +424,9 @@ 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 } }; diff --git a/src/mesa/drivers/dri/intel/intel_fbo.c b/src/mesa/drivers/dri/intel/intel_fbo.c index 6b13e37..2ec9294 100644 --- a/src/mesa/drivers/dri/intel/intel_fbo.c +++ b/src/mesa/drivers/dri/intel/intel_fbo.c @@ -674,6 +674,59 @@ intel_validate_framebuffer(GLcontext *ctx, struct gl_framebuffer *fb) /** + * Called from glBlitFramebuffer(). + * For now, we're doing an approximation with glCopyPixels(). + */ +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 (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. */ @@ -688,4 +741,5 @@ 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; } _______________________________________________ mesa-commit mailing list [email protected] http://lists.freedesktop.org/mailman/listinfo/mesa-commit
