/************************************************************************** * * 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; }