| /************************************************************************** |
| * |
| * Copyright 2007 VMware, Inc. |
| * All Rights Reserved. |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a |
| * copy of this software and associated documentation files (the |
| * "Software"), to deal in the Software without restriction, including |
| * without limitation the rights to use, copy, modify, merge, publish, |
| * distribute, sub license, and/or sell copies of the Software, and to |
| * permit persons to whom the Software is furnished to do so, subject to |
| * the following conditions: |
| * |
| * The above copyright notice and this permission notice (including the |
| * next paragraph) shall be included in all copies or substantial portions |
| * of the Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS |
| * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. |
| * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR |
| * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, |
| * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE |
| * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
| * |
| **************************************************************************/ |
| |
| /* |
| * Authors: |
| * Keith Whitwell <keithw@vmware.com> |
| * Brian Paul |
| */ |
| |
| #include <limits.h> |
| |
| #include "st_context.h" |
| #include "st_atom.h" |
| #include "st_cb_bitmap.h" |
| #include "st_cb_fbo.h" |
| #include "st_texture.h" |
| #include "pipe/p_context.h" |
| #include "cso_cache/cso_context.h" |
| #include "util/u_math.h" |
| #include "util/u_inlines.h" |
| #include "util/u_format.h" |
| #include "main/framebuffer.h" |
| |
| |
| /** |
| * Update framebuffer size. |
| * |
| * We need to derive pipe_framebuffer size from the bound pipe_surfaces here |
| * instead of copying gl_framebuffer size because for certain target types |
| * (like PIPE_TEXTURE_1D_ARRAY) gl_framebuffer::Height has the number of layers |
| * instead of 1. |
| */ |
| static void |
| update_framebuffer_size(struct pipe_framebuffer_state *framebuffer, |
| struct pipe_surface *surface) |
| { |
| assert(surface); |
| assert(surface->width < UINT_MAX); |
| assert(surface->height < UINT_MAX); |
| framebuffer->width = MIN2(framebuffer->width, surface->width); |
| framebuffer->height = MIN2(framebuffer->height, surface->height); |
| } |
| |
| /** |
| * Round up the requested multisample count to the next supported sample size. |
| */ |
| static unsigned |
| framebuffer_quantize_num_samples(struct st_context *st, unsigned num_samples) |
| { |
| struct pipe_screen *screen = st->pipe->screen; |
| int quantized_samples = 0; |
| unsigned msaa_mode; |
| |
| if (!num_samples) |
| return 0; |
| |
| /* Assumes the highest supported MSAA is a power of 2 */ |
| msaa_mode = util_next_power_of_two(st->ctx->Const.MaxFramebufferSamples); |
| assert(!(num_samples > msaa_mode)); /* be safe from infinite loops */ |
| |
| /** |
| * Check if the MSAA mode that is higher than the requested |
| * num_samples is supported, and if so returning it. |
| */ |
| for (; msaa_mode >= num_samples; msaa_mode = msaa_mode / 2) { |
| /** |
| * For ARB_framebuffer_no_attachment, A format of |
| * PIPE_FORMAT_NONE implies what number of samples is |
| * supported for a framebuffer with no attachment. Thus the |
| * drivers callback must be adjusted for this. |
| */ |
| if (screen->is_format_supported(screen, PIPE_FORMAT_NONE, |
| PIPE_TEXTURE_2D, msaa_mode, |
| PIPE_BIND_RENDER_TARGET)) |
| quantized_samples = msaa_mode; |
| } |
| return quantized_samples; |
| } |
| |
| /** |
| * Update framebuffer state (color, depth, stencil, etc. buffers) |
| */ |
| static void |
| update_framebuffer_state( struct st_context *st ) |
| { |
| struct pipe_framebuffer_state *framebuffer = &st->state.framebuffer; |
| struct gl_framebuffer *fb = st->ctx->DrawBuffer; |
| struct st_renderbuffer *strb; |
| GLuint i; |
| |
| st_flush_bitmap_cache(st); |
| st_invalidate_readpix_cache(st); |
| |
| st->state.fb_orientation = st_fb_orientation(fb); |
| |
| /** |
| * Quantize the derived default number of samples: |
| * |
| * A query to the driver of supported MSAA values the |
| * hardware supports is done as to legalize the number |
| * of application requested samples, NumSamples. |
| * See commit eb9cf3c for more information. |
| */ |
| fb->DefaultGeometry._NumSamples = |
| framebuffer_quantize_num_samples(st, fb->DefaultGeometry.NumSamples); |
| |
| framebuffer->width = _mesa_geometric_width(fb); |
| framebuffer->height = _mesa_geometric_height(fb); |
| framebuffer->samples = _mesa_geometric_samples(fb); |
| framebuffer->layers = _mesa_geometric_layers(fb); |
| |
| /* Examine Mesa's ctx->DrawBuffer->_ColorDrawBuffers state |
| * to determine which surfaces to draw to |
| */ |
| framebuffer->nr_cbufs = fb->_NumColorDrawBuffers; |
| |
| for (i = 0; i < fb->_NumColorDrawBuffers; i++) { |
| pipe_surface_reference(&framebuffer->cbufs[i], NULL); |
| |
| strb = st_renderbuffer(fb->_ColorDrawBuffers[i]); |
| |
| if (strb) { |
| if (strb->is_rtt || (strb->texture && |
| _mesa_get_format_color_encoding(strb->Base.Format) == GL_SRGB)) { |
| /* rendering to a GL texture, may have to update surface */ |
| st_update_renderbuffer_surface(st, strb); |
| } |
| |
| if (strb->surface) { |
| pipe_surface_reference(&framebuffer->cbufs[i], strb->surface); |
| update_framebuffer_size(framebuffer, strb->surface); |
| } |
| strb->defined = GL_TRUE; /* we'll be drawing something */ |
| } |
| } |
| |
| for (i = framebuffer->nr_cbufs; i < PIPE_MAX_COLOR_BUFS; i++) { |
| pipe_surface_reference(&framebuffer->cbufs[i], NULL); |
| } |
| |
| /* Remove trailing GL_NONE draw buffers. */ |
| while (framebuffer->nr_cbufs && |
| !framebuffer->cbufs[framebuffer->nr_cbufs-1]) { |
| framebuffer->nr_cbufs--; |
| } |
| |
| /* |
| * Depth/Stencil renderbuffer/surface. |
| */ |
| strb = st_renderbuffer(fb->Attachment[BUFFER_DEPTH].Renderbuffer); |
| if (strb) { |
| if (strb->is_rtt) { |
| /* rendering to a GL texture, may have to update surface */ |
| st_update_renderbuffer_surface(st, strb); |
| } |
| pipe_surface_reference(&framebuffer->zsbuf, strb->surface); |
| update_framebuffer_size(framebuffer, strb->surface); |
| } |
| else { |
| strb = st_renderbuffer(fb->Attachment[BUFFER_STENCIL].Renderbuffer); |
| if (strb) { |
| if (strb->is_rtt) { |
| /* rendering to a GL texture, may have to update surface */ |
| st_update_renderbuffer_surface(st, strb); |
| } |
| pipe_surface_reference(&framebuffer->zsbuf, strb->surface); |
| update_framebuffer_size(framebuffer, strb->surface); |
| } |
| else |
| pipe_surface_reference(&framebuffer->zsbuf, NULL); |
| } |
| |
| #ifdef DEBUG |
| /* Make sure the resource binding flags were set properly */ |
| for (i = 0; i < framebuffer->nr_cbufs; i++) { |
| assert(!framebuffer->cbufs[i] || |
| framebuffer->cbufs[i]->texture->bind & PIPE_BIND_RENDER_TARGET); |
| } |
| if (framebuffer->zsbuf) { |
| assert(framebuffer->zsbuf->texture->bind & PIPE_BIND_DEPTH_STENCIL); |
| } |
| #endif |
| |
| if (framebuffer->width == UINT_MAX) |
| framebuffer->width = 0; |
| if (framebuffer->height == UINT_MAX) |
| framebuffer->height = 0; |
| |
| cso_set_framebuffer(st->cso_context, framebuffer); |
| } |
| |
| |
| const struct st_tracked_state st_update_framebuffer = { |
| update_framebuffer_state /* update */ |
| }; |
| |