diff options
Diffstat (limited to 'src/mesa/state_tracker/st_framebuffer.c')
| -rw-r--r-- | src/mesa/state_tracker/st_framebuffer.c | 409 |
1 files changed, 409 insertions, 0 deletions
diff --git a/src/mesa/state_tracker/st_framebuffer.c b/src/mesa/state_tracker/st_framebuffer.c new file mode 100644 index 0000000000..ca32b2e573 --- /dev/null +++ b/src/mesa/state_tracker/st_framebuffer.c @@ -0,0 +1,409 @@ +/************************************************************************** + * + * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas. + * 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 TUNGSTEN GRAPHICS 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. + * + **************************************************************************/ + + +#include "main/imports.h" +#include "main/buffers.h" +#include "main/context.h" +#include "main/framebuffer.h" +#include "main/matrix.h" +#include "main/renderbuffer.h" +#include "main/scissor.h" +#include "main/viewport.h" +#include "st_context.h" +#include "st_cb_fbo.h" +#include "st_public.h" +#include "pipe/p_defines.h" +#include "pipe/p_context.h" + + +struct st_framebuffer * +st_create_framebuffer( const __GLcontextModes *visual, + enum pipe_format colorFormat, + enum pipe_format depthFormat, + enum pipe_format stencilFormat, + uint width, uint height, + void *private) +{ + struct st_framebuffer *stfb = ST_CALLOC_STRUCT(st_framebuffer); + if (stfb) { + int samples = st_get_msaa(); + + if (visual->sampleBuffers) + samples = visual->samples; + + _mesa_initialize_framebuffer(&stfb->Base, visual); + + if (visual->doubleBufferMode) { + struct gl_renderbuffer *rb + = st_new_renderbuffer_fb(colorFormat, samples, FALSE); + _mesa_add_renderbuffer(&stfb->Base, BUFFER_BACK_LEFT, rb); + } + else { + /* Only allocate front buffer right now if we're single buffered. + * If double-buffered, allocate front buffer on demand later. + * See check_create_front_buffers(). + */ + struct gl_renderbuffer *rb + = st_new_renderbuffer_fb(colorFormat, samples, FALSE); + _mesa_add_renderbuffer(&stfb->Base, BUFFER_FRONT_LEFT, rb); + } + + if (depthFormat == stencilFormat && depthFormat != PIPE_FORMAT_NONE) { + /* combined depth/stencil buffer */ + struct gl_renderbuffer *depthStencilRb + = st_new_renderbuffer_fb(depthFormat, samples, FALSE); + /* note: bind RB to two attachment points */ + _mesa_add_renderbuffer(&stfb->Base, BUFFER_DEPTH, depthStencilRb); + _mesa_add_renderbuffer(&stfb->Base, BUFFER_STENCIL, depthStencilRb); + } + else { + /* separate depth and/or stencil */ + + if (visual->depthBits == 32) { + /* 32-bit depth buffer */ + struct gl_renderbuffer *depthRb + = st_new_renderbuffer_fb(depthFormat, samples, FALSE); + _mesa_add_renderbuffer(&stfb->Base, BUFFER_DEPTH, depthRb); + } + else if (visual->depthBits == 24) { + /* 24-bit depth buffer, ignore stencil bits */ + struct gl_renderbuffer *depthRb + = st_new_renderbuffer_fb(depthFormat, samples, FALSE); + _mesa_add_renderbuffer(&stfb->Base, BUFFER_DEPTH, depthRb); + } + else if (visual->depthBits > 0) { + /* 16-bit depth buffer */ + struct gl_renderbuffer *depthRb + = st_new_renderbuffer_fb(depthFormat, samples, FALSE); + _mesa_add_renderbuffer(&stfb->Base, BUFFER_DEPTH, depthRb); + } + + if (visual->stencilBits > 0) { + /* 8-bit stencil */ + struct gl_renderbuffer *stencilRb + = st_new_renderbuffer_fb(stencilFormat, samples, FALSE); + _mesa_add_renderbuffer(&stfb->Base, BUFFER_STENCIL, stencilRb); + } + } + + if (visual->accumRedBits > 0) { + /* 16-bit/channel accum */ + /* TODO: query the pipe screen for accumulation buffer format support */ + struct gl_renderbuffer *accumRb + = st_new_renderbuffer_fb(PIPE_FORMAT_R16G16B16A16_SNORM, 0, TRUE); + _mesa_add_renderbuffer(&stfb->Base, BUFFER_ACCUM, accumRb); + } + + stfb->Base.Initialized = GL_TRUE; + stfb->InitWidth = width; + stfb->InitHeight = height; + stfb->Private = private; + } + return stfb; +} + + +void st_resize_framebuffer( struct st_framebuffer *stfb, + uint width, uint height ) +{ + if (stfb->Base.Width != width || stfb->Base.Height != height) { + GET_CURRENT_CONTEXT(ctx); + if (ctx) { + _mesa_check_init_viewport(ctx, width, height); + + _mesa_resize_framebuffer(ctx, &stfb->Base, width, height); + + assert(stfb->Base.Width == width); + assert(stfb->Base.Height == height); + } + } +} + + +void st_unreference_framebuffer( struct st_framebuffer *stfb ) +{ + _mesa_reference_framebuffer((struct gl_framebuffer **) &stfb, NULL); +} + + + +/** + * Set/replace a framebuffer surface. + * The user of the state tracker can use this instead of + * st_resize_framebuffer() to provide new surfaces when a window is resized. + */ +void +st_set_framebuffer_surface(struct st_framebuffer *stfb, + uint surfIndex, struct pipe_surface *surf) +{ + GET_CURRENT_CONTEXT(ctx); + static const GLuint invalid_size = 9999999; + struct st_renderbuffer *strb; + GLuint width, height, i; + + assert(surfIndex < BUFFER_COUNT); + + strb = st_renderbuffer(stfb->Base.Attachment[surfIndex].Renderbuffer); + + /* fail */ + if (!strb) return; + + /* replace the renderbuffer's surface/texture pointers */ + pipe_surface_reference( &strb->surface, surf ); + pipe_texture_reference( &strb->texture, surf->texture ); + + if (ctx) { + /* If ctx isn't set, we've likely not made current yet. + * But when we do, we need to start setting this dirty bit + * to ensure the renderbuffer attachements are up-to-date + * via update_framebuffer. + */ + ctx->st->dirty.st |= ST_NEW_FRAMEBUFFER; + } + + /* update renderbuffer's width/height */ + strb->Base.Width = surf->width; + strb->Base.Height = surf->height; + + /* Try to update the framebuffer's width/height from the renderbuffer + * sizes. Before we start drawing, all the rbs _should_ be the same size. + */ + width = height = invalid_size; + for (i = 0; i < BUFFER_COUNT; i++) { + if (stfb->Base.Attachment[i].Renderbuffer) { + if (width == invalid_size) { + width = stfb->Base.Attachment[i].Renderbuffer->Width; + height = stfb->Base.Attachment[i].Renderbuffer->Height; + } + else if (width != stfb->Base.Attachment[i].Renderbuffer->Width || + height != stfb->Base.Attachment[i].Renderbuffer->Height) { + /* inconsistant renderbuffer sizes, bail out */ + return; + } + } + } + + if (width != invalid_size) { + /* OK, the renderbuffers are of a consistant size, so update the + * parent framebuffer's size. + */ + stfb->Base.Width = width; + stfb->Base.Height = height; + } +} + + + +/** + * Return the pipe_surface for the given renderbuffer. + */ +int +st_get_framebuffer_surface(struct st_framebuffer *stfb, uint surfIndex, struct pipe_surface **surface) +{ + struct st_renderbuffer *strb; + + assert(surfIndex <= ST_SURFACE_DEPTH); + + /* sanity checks, ST tokens should match Mesa tokens */ + assert(ST_SURFACE_FRONT_LEFT == BUFFER_FRONT_LEFT); + assert(ST_SURFACE_BACK_RIGHT == BUFFER_BACK_RIGHT); + + strb = st_renderbuffer(stfb->Base.Attachment[surfIndex].Renderbuffer); + if (strb) { + *surface = strb->surface; + return GL_TRUE; + } + + *surface = NULL; + return GL_FALSE; +} + +int +st_get_framebuffer_texture(struct st_framebuffer *stfb, uint surfIndex, struct pipe_texture **texture) +{ + struct st_renderbuffer *strb; + + assert(surfIndex <= ST_SURFACE_DEPTH); + + /* sanity checks, ST tokens should match Mesa tokens */ + assert(ST_SURFACE_FRONT_LEFT == BUFFER_FRONT_LEFT); + assert(ST_SURFACE_BACK_RIGHT == BUFFER_BACK_RIGHT); + + strb = st_renderbuffer(stfb->Base.Attachment[surfIndex].Renderbuffer); + if (strb) { + *texture = strb->texture; + return GL_TRUE; + } + + *texture = NULL; + return GL_FALSE; +} + +/** + * This function is to be called prior to SwapBuffers on the given + * framebuffer. It checks if the current context is bound to the framebuffer + * and flushes rendering if needed. + */ +void +st_notify_swapbuffers(struct st_framebuffer *stfb) +{ + GET_CURRENT_CONTEXT(ctx); + + if (ctx && ctx->DrawBuffer == &stfb->Base) { + st_flush( ctx->st, + PIPE_FLUSH_RENDER_CACHE | + PIPE_FLUSH_SWAPBUFFERS | + PIPE_FLUSH_FRAME, + NULL ); + if (st_renderbuffer(stfb->Base.Attachment[BUFFER_BACK_LEFT].Renderbuffer)) + ctx->st->frontbuffer_status = FRONT_STATUS_COPY_OF_BACK; + } +} + + +/** + * Swap the front/back color buffers. Exchange the front/back pointers + * and update some derived state. + * No need to call st_notify_swapbuffers() first. + * + * For a single-buffered framebuffer, no swap occurs, but we still return + * the pointer(s) to the front color buffer(s). + * + * \param front_left returns pointer to front-left renderbuffer after swap + * \param front_right returns pointer to front-right renderbuffer after swap + */ +void +st_swapbuffers(struct st_framebuffer *stfb, + struct pipe_surface **front_left, + struct pipe_surface **front_right) +{ + struct gl_framebuffer *fb = &stfb->Base; + + GET_CURRENT_CONTEXT(ctx); + + if (ctx && ctx->DrawBuffer == &stfb->Base) { + st_flush( ctx->st, + PIPE_FLUSH_RENDER_CACHE | + PIPE_FLUSH_SWAPBUFFERS | + PIPE_FLUSH_FRAME, + NULL ); + } + + if (!fb->Visual.doubleBufferMode) { + /* single buffer mode - return pointers to front surfaces */ + if (front_left) { + struct st_renderbuffer *strb = + st_renderbuffer(fb->Attachment[BUFFER_FRONT_LEFT].Renderbuffer); + *front_left = strb->surface; + } + if (front_right) { + struct st_renderbuffer *strb = + st_renderbuffer(fb->Attachment[BUFFER_FRONT_RIGHT].Renderbuffer); + *front_right = strb ? strb->surface : NULL; + } + return; + } + + /* swap left buffers */ + if (fb->Attachment[BUFFER_FRONT_LEFT].Renderbuffer && + fb->Attachment[BUFFER_BACK_LEFT].Renderbuffer) { + struct gl_renderbuffer *rbTemp; + rbTemp = fb->Attachment[BUFFER_FRONT_LEFT].Renderbuffer; + fb->Attachment[BUFFER_FRONT_LEFT].Renderbuffer = + fb->Attachment[BUFFER_BACK_LEFT].Renderbuffer; + fb->Attachment[BUFFER_BACK_LEFT].Renderbuffer = rbTemp; + if (front_left) { + struct st_renderbuffer *strb = + st_renderbuffer(fb->Attachment[BUFFER_FRONT_LEFT].Renderbuffer); + *front_left = strb->surface; + } + /* mark back buffer contents as undefined */ + { + struct st_renderbuffer *back = + st_renderbuffer(fb->Attachment[BUFFER_BACK_LEFT].Renderbuffer); + back->defined = GL_FALSE; + } + } + else { + /* no front buffer, display the back buffer */ + if (front_left) { + struct st_renderbuffer *strb = + st_renderbuffer(fb->Attachment[BUFFER_BACK_LEFT].Renderbuffer); + *front_left = strb->surface; + } + } + + /* swap right buffers (for stereo) */ + if (fb->Attachment[BUFFER_FRONT_RIGHT].Renderbuffer && + fb->Attachment[BUFFER_BACK_RIGHT].Renderbuffer) { + struct gl_renderbuffer *rbTemp; + rbTemp = fb->Attachment[BUFFER_FRONT_RIGHT].Renderbuffer; + fb->Attachment[BUFFER_FRONT_RIGHT].Renderbuffer = + fb->Attachment[BUFFER_BACK_RIGHT].Renderbuffer; + fb->Attachment[BUFFER_BACK_RIGHT].Renderbuffer = rbTemp; + if (front_right) { + struct st_renderbuffer *strb = + st_renderbuffer(fb->Attachment[BUFFER_FRONT_RIGHT].Renderbuffer); + *front_right = strb->surface; + } + /* mark back buffer contents as undefined */ + { + struct st_renderbuffer *back = + st_renderbuffer(fb->Attachment[BUFFER_BACK_RIGHT].Renderbuffer); + back->defined = GL_FALSE; + } + } + else { + /* no front right buffer, display back right buffer (if exists) */ + if (front_right) { + struct st_renderbuffer *strb = + st_renderbuffer(fb->Attachment[BUFFER_BACK_RIGHT].Renderbuffer); + *front_right = strb ? strb->surface : NULL; + } + } + + /* Update the _ColorDrawBuffers[] array and _ColorReadBuffer pointer */ + _mesa_update_framebuffer(ctx); + + /* Make sure we draw into the new back surface */ + st_invalidate_state(ctx, _NEW_BUFFERS); +} + + +void *st_framebuffer_private( struct st_framebuffer *stfb ) +{ + return stfb->Private; +} + +void st_get_framebuffer_dimensions( struct st_framebuffer *stfb, + uint *width, + uint *height) +{ + *width = stfb->Base.Width; + *height = stfb->Base.Height; +} |