This interface gives the driver two important features. First, it can allocate the (fake) front-buffer only when needed. Second, it can tell the buffer allocator the format of buffers being allocated. This enables support for back-buffer and depth-buffer with different bits per pixel.
Signed-off-by: Ian Romanick <[email protected]> --- src/mesa/drivers/dri/intel/intel_buffers.c | 10 +++ src/mesa/drivers/dri/intel/intel_context.c | 105 +++++++++++++++++++++++---- 2 files changed, 99 insertions(+), 16 deletions(-) diff --git a/src/mesa/drivers/dri/intel/intel_buffers.c b/src/mesa/drivers/dri/intel/intel_buffers.c index 90964df..1b38d4c 100644 --- a/src/mesa/drivers/dri/intel/intel_buffers.c +++ b/src/mesa/drivers/dri/intel/intel_buffers.c @@ -323,8 +323,18 @@ intelDrawBuffer(GLcontext * ctx, GLenum mode) { if ((ctx->DrawBuffer != NULL) && (ctx->DrawBuffer->Name == 0)) { struct intel_context *const intel = intel_context(ctx); + const GLboolean was_front_buffer_rendering = + intel->is_front_buffer_rendering; intel->is_front_buffer_rendering = (mode == GL_FRONT_LEFT); + + /* If we weren't front-buffer rendering before but we are now, make sure + * that the front-buffer has actually been allocated. + */ + if (!was_front_buffer_rendering && intel->is_front_buffer_rendering) { + intel_update_renderbuffers(intel->driContext, + intel->driContext->driDrawablePriv); + } } intel_draw_buffer(ctx, ctx->DrawBuffer); diff --git a/src/mesa/drivers/dri/intel/intel_context.c b/src/mesa/drivers/dri/intel/intel_context.c index 3436b8e..3400dbe 100644 --- a/src/mesa/drivers/dri/intel/intel_context.c +++ b/src/mesa/drivers/dri/intel/intel_context.c @@ -173,6 +173,24 @@ intelGetString(GLcontext * ctx, GLenum name) } } +static unsigned +intel_bits_per_pixel(const struct intel_renderbuffer *rb) +{ + switch (rb->Base._ActualFormat) { + case GL_RGB5: + case GL_DEPTH_COMPONENT16: + return 16; + case GL_RGB8: + case GL_RGBA8: + case GL_DEPTH_COMPONENT24: + case GL_DEPTH24_STENCIL8_EXT: + case GL_STENCIL_INDEX8_EXT: + return 32; + default: + return 0; + } +} + void intel_update_renderbuffers(__DRIcontext *context, __DRIdrawable *drawable) { @@ -192,22 +210,62 @@ intel_update_renderbuffers(__DRIcontext *context, __DRIdrawable *drawable) screen = intel->intelScreen->driScrnPriv; - i = 0; - if (intel_fb->color_rb[0]) - attachments[i++] = __DRI_BUFFER_FRONT_LEFT; - if (intel_fb->color_rb[1]) - attachments[i++] = __DRI_BUFFER_BACK_LEFT; - if (intel_get_renderbuffer(&intel_fb->Base, BUFFER_DEPTH)) - attachments[i++] = __DRI_BUFFER_DEPTH; - if (intel_get_renderbuffer(&intel_fb->Base, BUFFER_STENCIL)) - attachments[i++] = __DRI_BUFFER_STENCIL; - - buffers = (*screen->dri2.loader->getBuffers)(drawable, - &drawable->w, - &drawable->h, - attachments, i, - &count, - drawable->loaderPrivate); + if ((screen->dri2.loader->base.version > 2) + && (screen->dri2.loader->getBuffersWithFormat != NULL)) { + struct intel_renderbuffer *depth_rb; + struct intel_renderbuffer *stencil_rb; + + i = 0; + if ((intel->is_front_buffer_rendering || !intel_fb->color_rb[1]) + && intel_fb->color_rb[0]) { + attachments[i++] = __DRI_BUFFER_FRONT_LEFT; + attachments[i++] = intel_bits_per_pixel(intel_fb->color_rb[0]); + } + + if (intel_fb->color_rb[1]) { + attachments[i++] = __DRI_BUFFER_BACK_LEFT; + attachments[i++] = intel_bits_per_pixel(intel_fb->color_rb[1]); + } + + depth_rb = intel_get_renderbuffer(&intel_fb->Base, BUFFER_DEPTH); + stencil_rb = intel_get_renderbuffer(&intel_fb->Base, BUFFER_STENCIL); + + if ((depth_rb != NULL) && (stencil_rb != NULL)) { + attachments[i++] = __DRI_BUFFER_DEPTH_STENCIL; + attachments[i++] = intel_bits_per_pixel(depth_rb); + } else if (depth_rb != NULL) { + attachments[i++] = __DRI_BUFFER_DEPTH; + attachments[i++] = intel_bits_per_pixel(depth_rb); + } else if (stencil_rb != NULL) { + attachments[i++] = __DRI_BUFFER_STENCIL; + attachments[i++] = intel_bits_per_pixel(stencil_rb); + } + + buffers = + (*screen->dri2.loader->getBuffersWithFormat)(drawable, + &drawable->w, + &drawable->h, + attachments, i / 2, + &count, + drawable->loaderPrivate); + } else { + i = 0; + if (intel_fb->color_rb[0]) + attachments[i++] = __DRI_BUFFER_FRONT_LEFT; + if (intel_fb->color_rb[1]) + attachments[i++] = __DRI_BUFFER_BACK_LEFT; + if (intel_get_renderbuffer(&intel_fb->Base, BUFFER_DEPTH)) + attachments[i++] = __DRI_BUFFER_DEPTH; + if (intel_get_renderbuffer(&intel_fb->Base, BUFFER_STENCIL)) + attachments[i++] = __DRI_BUFFER_STENCIL; + + buffers = (*screen->dri2.loader->getBuffers)(drawable, + &drawable->w, + &drawable->h, + attachments, i, + &count, + drawable->loaderPrivate); + } if (buffers == NULL) return; @@ -250,6 +308,11 @@ intel_update_renderbuffers(__DRIcontext *context, __DRIdrawable *drawable) region_name = "dri2 depth buffer"; break; + case __DRI_BUFFER_DEPTH_STENCIL: + rb = intel_get_renderbuffer(&intel_fb->Base, BUFFER_DEPTH); + region_name = "dri2 depth / stencil buffer"; + break; + case __DRI_BUFFER_STENCIL: rb = intel_get_renderbuffer(&intel_fb->Base, BUFFER_STENCIL); region_name = "dri2 stencil buffer"; @@ -296,6 +359,16 @@ intel_update_renderbuffers(__DRIcontext *context, __DRIdrawable *drawable) intel_renderbuffer_set_region(rb, region); intel_region_release(®ion); + + if (buffers[i].attachment == __DRI_BUFFER_DEPTH_STENCIL) { + struct intel_region *stencil_region; + + intel_region_reference(&stencil_region, region); + + rb = intel_get_renderbuffer(&intel_fb->Base, BUFFER_STENCIL); + intel_renderbuffer_set_region(rb, stencil_region); + intel_region_release(&stencil_region); + } } driUpdateFramebufferSize(&intel->ctx, drawable); -- 1.6.0.6 ------------------------------------------------------------------------------ Stay on top of everything new and different, both inside and around Java (TM) technology - register by April 22, and save $200 on the JavaOne (SM) conference, June 2-5, 2009, San Francisco. 300 plus technical and hands-on sessions. 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