/* * Mesa 3-D graphics library * * Copyright (C) 1999-2008 Brian Paul All Rights Reserved. * Copyright (C) 1999-2013 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, sublicense, * 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 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 NONINFRINGEMENT. IN NO EVENT SHALL * THE AUTHORS OR COPYRIGHT HOLDERS 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. */ /* * glBlitFramebuffer functions. */ #include #include #include "context.h" #include "enums.h" #include "blit.h" #include "fbobject.h" #include "framebuffer.h" #include "glformats.h" #include "image.h" #include "mtypes.h" #include "macros.h" #include "readpix.h" #include "renderbuffer.h" #include "state.h" #include "api_exec_decl.h" #include "state_tracker/st_cb_bitmap.h" #include "state_tracker/st_cb_texture.h" #include "state_tracker/st_manager.h" #include "state_tracker/st_context.h" #include "state_tracker/st_scissor.h" #include "state_tracker/st_texture.h" #include "state_tracker/st_util.h" /** Set this to 1 to debug/log glBlitFramebuffer() calls */ #define DEBUG_BLIT 0 static const struct gl_renderbuffer_attachment * find_attachment(const struct gl_framebuffer *fb, const struct gl_renderbuffer *rb) { GLuint i; for (i = 0; i < ARRAY_SIZE(fb->Attachment); i++) { if (fb->Attachment[i].Renderbuffer == rb) return &fb->Attachment[i]; } return NULL; } /** * \return true if two regions overlap, false otherwise */ bool _mesa_regions_overlap(int srcX0, int srcY0, int srcX1, int srcY1, int dstX0, int dstY0, int dstX1, int dstY1) { if (MAX2(srcX0, srcX1) <= MIN2(dstX0, dstX1)) return false; /* dst completely right of src */ if (MAX2(dstX0, dstX1) <= MIN2(srcX0, srcX1)) return false; /* dst completely left of src */ if (MAX2(srcY0, srcY1) <= MIN2(dstY0, dstY1)) return false; /* dst completely above src */ if (MAX2(dstY0, dstY1) <= MIN2(srcY0, srcY1)) return false; /* dst completely below src */ return true; /* some overlap */ } /** * Helper function for checking if the datatypes of color buffers are * compatible for glBlitFramebuffer. From the 3.1 spec, page 198: * * "GL_INVALID_OPERATION is generated if mask contains GL_COLOR_BUFFER_BIT * and any of the following conditions hold: * - The read buffer contains fixed-point or floating-point values and any * draw buffer contains neither fixed-point nor floating-point values. * - The read buffer contains unsigned integer values and any draw buffer * does not contain unsigned integer values. * - The read buffer contains signed integer values and any draw buffer * does not contain signed integer values." */ static GLboolean compatible_color_datatypes(mesa_format srcFormat, mesa_format dstFormat) { GLenum srcType = _mesa_get_format_datatype(srcFormat); GLenum dstType = _mesa_get_format_datatype(dstFormat); if (srcType != GL_INT && srcType != GL_UNSIGNED_INT) { assert(srcType == GL_UNSIGNED_NORMALIZED || srcType == GL_SIGNED_NORMALIZED || srcType == GL_FLOAT); /* Boil any of those types down to GL_FLOAT */ srcType = GL_FLOAT; } if (dstType != GL_INT && dstType != GL_UNSIGNED_INT) { assert(dstType == GL_UNSIGNED_NORMALIZED || dstType == GL_SIGNED_NORMALIZED || dstType == GL_FLOAT); /* Boil any of those types down to GL_FLOAT */ dstType = GL_FLOAT; } return srcType == dstType; } static GLboolean compatible_resolve_formats(const struct gl_renderbuffer *readRb, const struct gl_renderbuffer *drawRb) { GLenum readFormat, drawFormat; /* This checks whether the internal formats are compatible rather than the * Mesa format for two reasons: * * • Under some circumstances, the user may request e.g. two GL_RGBA8 * textures and get two entirely different Mesa formats like RGBA8888 and * ARGB8888. Drivers behaving like that should be able to cope with * non-matching formats by themselves, because it's not the user's fault. * * • Picking two different internal formats can end up with the same Mesa * format. For example the driver might be simulating GL_RGB textures * with GL_RGBA internally and in that case both internal formats would * end up with RGBA8888. * * This function is used to generate a GL error according to the spec so in * both cases we want to be looking at the application-level format, which * is InternalFormat. * * Blits between linear and sRGB formats are also allowed. */ readFormat = _mesa_get_nongeneric_internalformat(readRb->InternalFormat); drawFormat = _mesa_get_nongeneric_internalformat(drawRb->InternalFormat); readFormat = _mesa_get_linear_internalformat(readFormat); drawFormat = _mesa_get_linear_internalformat(drawFormat); if (readFormat == drawFormat) { return GL_TRUE; } return GL_FALSE; } static GLboolean is_valid_blit_filter(const struct gl_context *ctx, GLenum filter) { switch (filter) { case GL_NEAREST: case GL_LINEAR: return true; case GL_SCALED_RESOLVE_FASTEST_EXT: case GL_SCALED_RESOLVE_NICEST_EXT: return ctx->Extensions.EXT_framebuffer_multisample_blit_scaled; default: return false; } } static bool validate_color_buffer(struct gl_context *ctx, struct gl_framebuffer *readFb, struct gl_framebuffer *drawFb, GLenum filter, const char *func) { const GLuint numColorDrawBuffers = drawFb->_NumColorDrawBuffers; const struct gl_renderbuffer *colorReadRb = readFb->_ColorReadBuffer; const struct gl_renderbuffer *colorDrawRb = NULL; GLuint i; for (i = 0; i < numColorDrawBuffers; i++) { colorDrawRb = drawFb->_ColorDrawBuffers[i]; if (!colorDrawRb) continue; /* Page 193 (page 205 of the PDF) in section 4.3.2 of the OpenGL * ES 3.0.1 spec says: * * "If the source and destination buffers are identical, an * INVALID_OPERATION error is generated. Different mipmap levels of a * texture, different layers of a three- dimensional texture or * two-dimensional array texture, and different faces of a cube map * texture do not constitute identical buffers." */ if (_mesa_is_gles3(ctx) && (colorDrawRb == colorReadRb)) { _mesa_error(ctx, GL_INVALID_OPERATION, "%s(source and destination color buffer cannot be the " "same)", func); return false; } if (!compatible_color_datatypes(colorReadRb->Format, colorDrawRb->Format)) { _mesa_error(ctx, GL_INVALID_OPERATION, "%s(color buffer datatypes mismatch)", func); return false; } /* extra checks for multisample copies... */ if (readFb->Visual.samples > 0 || drawFb->Visual.samples > 0) { /* color formats must match on GLES. This isn't checked on desktop GL * because the GL 4.4 spec was changed to allow it. In the section * entitled “Changes in the released * Specification of July 22, 2013” it says: * * “Relax BlitFramebuffer in section 18.3.1 so that format conversion * can take place during multisample blits, since drivers already * allow this and some apps depend on it.” */ if (_mesa_is_gles(ctx) && !compatible_resolve_formats(colorReadRb, colorDrawRb)) { _mesa_error(ctx, GL_INVALID_OPERATION, "%s(bad src/dst multisample pixel formats)", func); return false; } } } if (filter != GL_NEAREST) { /* From EXT_framebuffer_multisample_blit_scaled specification: * "Calling BlitFramebuffer will result in an INVALID_OPERATION error if * filter is not NEAREST and read buffer contains integer data." */ GLenum type = _mesa_get_format_datatype(colorReadRb->Format); if (type == GL_INT || type == GL_UNSIGNED_INT) { _mesa_error(ctx, GL_INVALID_OPERATION, "%s(integer color type)", func); return false; } } return true; } static bool validate_stencil_buffer(struct gl_context *ctx, struct gl_framebuffer *readFb, struct gl_framebuffer *drawFb, const char *func) { struct gl_renderbuffer *readRb = readFb->Attachment[BUFFER_STENCIL].Renderbuffer; struct gl_renderbuffer *drawRb = drawFb->Attachment[BUFFER_STENCIL].Renderbuffer; int read_z_bits, draw_z_bits; if (_mesa_is_gles3(ctx) && (drawRb == readRb)) { _mesa_error(ctx, GL_INVALID_OPERATION, "%s(source and destination stencil buffer cannot be the " "same)", func); return false; } if (_mesa_get_format_bits(readRb->Format, GL_STENCIL_BITS) != _mesa_get_format_bits(drawRb->Format, GL_STENCIL_BITS)) { /* There is no need to check the stencil datatype here, because * there is only one: GL_UNSIGNED_INT. */ _mesa_error(ctx, GL_INVALID_OPERATION, "%s(stencil attachment format mismatch)", func); return false; } read_z_bits = _mesa_get_format_bits(readRb->Format, GL_DEPTH_BITS); draw_z_bits = _mesa_get_format_bits(drawRb->Format, GL_DEPTH_BITS); /* If both buffers also have depth data, the depth formats must match * as well. If one doesn't have depth, it's not blitted, so we should * ignore the depth format check. */ if (read_z_bits > 0 && draw_z_bits > 0 && (read_z_bits != draw_z_bits || _mesa_get_format_datatype(readRb->Format) != _mesa_get_format_datatype(drawRb->Format))) { _mesa_error(ctx, GL_INVALID_OPERATION, "%s(stencil attachment depth format mismatch)", func); return false; } return true; } static bool validate_depth_buffer(struct gl_context *ctx, struct gl_framebuffer *readFb, struct gl_framebuffer *drawFb, const char *func) { struct gl_renderbuffer *readRb = readFb->Attachment[BUFFER_DEPTH].Renderbuffer; struct gl_renderbuffer *drawRb = drawFb->Attachment[BUFFER_DEPTH].Renderbuffer; int read_s_bit, draw_s_bit; if (_mesa_is_gles3(ctx) && (drawRb == readRb)) { _mesa_error(ctx, GL_INVALID_OPERATION, "%s(source and destination depth buffer cannot be the same)", func); return false; } if ((_mesa_get_format_bits(readRb->Format, GL_DEPTH_BITS) != _mesa_get_format_bits(drawRb->Format, GL_DEPTH_BITS)) || (_mesa_get_format_datatype(readRb->Format) != _mesa_get_format_datatype(drawRb->Format))) { _mesa_error(ctx, GL_INVALID_OPERATION, "%s(depth attachment format mismatch)", func); return false; } read_s_bit = _mesa_get_format_bits(readRb->Format, GL_STENCIL_BITS); draw_s_bit = _mesa_get_format_bits(drawRb->Format, GL_STENCIL_BITS); /* If both buffers also have stencil data, the stencil formats must match as * well. If one doesn't have stencil, it's not blitted, so we should ignore * the stencil format check. */ if (read_s_bit > 0 && draw_s_bit > 0 && read_s_bit != draw_s_bit) { _mesa_error(ctx, GL_INVALID_OPERATION, "%s(depth attachment stencil bits mismatch)", func); return false; } return true; } static void do_blit_framebuffer(struct gl_context *ctx, struct gl_framebuffer *readFB, struct gl_framebuffer *drawFB, GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1, GLint dstX0, GLint dstY0, GLint dstX1, GLint dstY1, GLbitfield mask, GLenum filter) { struct st_context *st = st_context(ctx); const GLbitfield depthStencil = (GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT); const uint pFilter = ((filter == GL_NEAREST) ? PIPE_TEX_FILTER_NEAREST : PIPE_TEX_FILTER_LINEAR); struct { GLint srcX0, srcY0, srcX1, srcY1; GLint dstX0, dstY0, dstX1, dstY1; } clip; struct pipe_blit_info blit; st_manager_validate_framebuffers(st); /* Make sure bitmap rendering has landed in the framebuffers */ st_flush_bitmap_cache(st); st_invalidate_readpix_cache(st); clip.srcX0 = srcX0; clip.srcY0 = srcY0; clip.srcX1 = srcX1; clip.srcY1 = srcY1; clip.dstX0 = dstX0; clip.dstY0 = dstY0; clip.dstX1 = dstX1; clip.dstY1 = dstY1; /* NOTE: If the src and dst dimensions don't match, we cannot simply adjust * the integer coordinates to account for clipping (or scissors) because that * would make us cut off fractional parts, affecting the result of the blit. * * XXX: This should depend on mask ! */ if (!_mesa_clip_blit(ctx, readFB, drawFB, &clip.srcX0, &clip.srcY0, &clip.srcX1, &clip.srcY1, &clip.dstX0, &clip.dstY0, &clip.dstX1, &clip.dstY1)) { return; /* nothing to draw/blit */ } memset(&blit, 0, sizeof(struct pipe_blit_info)); blit.scissor_enable = (dstX0 != clip.dstX0) || (dstY0 != clip.dstY0) || (dstX1 != clip.dstX1) || (dstY1 != clip.dstY1); if (_mesa_fb_orientation(drawFB) == Y_0_TOP) { /* invert Y for dest */ dstY0 = drawFB->Height - dstY0; dstY1 = drawFB->Height - dstY1; /* invert Y for clip */ clip.dstY0 = drawFB->Height - clip.dstY0; clip.dstY1 = drawFB->Height - clip.dstY1; } if (blit.scissor_enable) { blit.scissor.minx = MIN2(clip.dstX0, clip.dstX1); blit.scissor.miny = MIN2(clip.dstY0, clip.dstY1); blit.scissor.maxx = MAX2(clip.dstX0, clip.dstX1); blit.scissor.maxy = MAX2(clip.dstY0, clip.dstY1); #if 0 debug_printf("scissor = (%i,%i)-(%i,%i)\n", blit.scissor.minx,blit.scissor.miny, blit.scissor.maxx,blit.scissor.maxy); #endif } if (_mesa_fb_orientation(readFB) == Y_0_TOP) { /* invert Y for src */ srcY0 = readFB->Height - srcY0; srcY1 = readFB->Height - srcY1; } if (srcY0 > srcY1 && dstY0 > dstY1) { /* Both src and dst are upside down. Swap Y to make it * right-side up to increase odds of using a fast path. * Recall that all Gallium raster coords have Y=0=top. */ GLint tmp; tmp = srcY0; srcY0 = srcY1; srcY1 = tmp; tmp = dstY0; dstY0 = dstY1; dstY1 = tmp; } blit.src.box.depth = 1; blit.dst.box.depth = 1; /* Destination dimensions have to be positive: */ if (dstX0 < dstX1) { blit.dst.box.x = dstX0; blit.src.box.x = srcX0; blit.dst.box.width = dstX1 - dstX0; blit.src.box.width = srcX1 - srcX0; } else { blit.dst.box.x = dstX1; blit.src.box.x = srcX1; blit.dst.box.width = dstX0 - dstX1; blit.src.box.width = srcX0 - srcX1; } if (dstY0 < dstY1) { blit.dst.box.y = dstY0; blit.src.box.y = srcY0; blit.dst.box.height = dstY1 - dstY0; blit.src.box.height = srcY1 - srcY0; } else { blit.dst.box.y = dstY1; blit.src.box.y = srcY1; blit.dst.box.height = dstY0 - dstY1; blit.src.box.height = srcY0 - srcY1; } if (drawFB != ctx->WinSysDrawBuffer) st_window_rectangles_to_blit(ctx, &blit); blit.filter = pFilter; blit.render_condition_enable = st->has_conditional_render; blit.alpha_blend = false; if (mask & GL_COLOR_BUFFER_BIT) { struct gl_renderbuffer_attachment *srcAtt = &readFB->Attachment[readFB->_ColorReadBufferIndex]; GLuint i; blit.mask = PIPE_MASK_RGBA; if (srcAtt->Type == GL_TEXTURE) { /* Make sure that the st_texture_object->pt is the current storage for * our miplevel. The finalize would happen at some point anyway, might * as well be now. */ st_finalize_texture(ctx, ctx->pipe, srcAtt->Texture, srcAtt->CubeMapFace); struct gl_texture_object *srcObj = srcAtt->Texture; if (!srcObj || !srcObj->pt) { return; } blit.src.resource = srcObj->pt; blit.src.level = srcAtt->TextureLevel; blit.src.box.z = srcAtt->Zoffset + srcAtt->CubeMapFace; blit.src.format = srcObj->surface_based ? srcObj->surface_format : srcObj->pt->format; if (!ctx->Color.sRGBEnabled) blit.src.format = util_format_linear(blit.src.format); } else { struct gl_renderbuffer *srcRb = readFB->_ColorReadBuffer; struct pipe_surface *srcSurf; if (!srcRb) return; _mesa_update_renderbuffer_surface(ctx, srcRb); if (!srcRb->surface) return; srcSurf = srcRb->surface; blit.src.resource = srcSurf->texture; blit.src.level = srcSurf->u.tex.level; blit.src.box.z = srcSurf->u.tex.first_layer; blit.src.format = srcSurf->format; } for (i = 0; i < drawFB->_NumColorDrawBuffers; i++) { struct gl_renderbuffer *dstRb = drawFB->_ColorDrawBuffers[i]; if (dstRb) { struct pipe_surface *dstSurf; _mesa_update_renderbuffer_surface(ctx, dstRb); dstSurf = dstRb->surface; if (dstSurf) { blit.dst.resource = dstSurf->texture; blit.dst.level = dstSurf->u.tex.level; blit.dst.box.z = dstSurf->u.tex.first_layer; blit.dst.format = dstSurf->format; ctx->pipe->blit(ctx->pipe, &blit); dstRb->defined = true; /* front buffer tracking */ } } } } if (mask & depthStencil) { /* depth and/or stencil blit */ /* get src/dst depth surfaces */ struct gl_renderbuffer *srcDepthRb = readFB->Attachment[BUFFER_DEPTH].Renderbuffer; struct gl_renderbuffer *dstDepthRb = drawFB->Attachment[BUFFER_DEPTH].Renderbuffer; struct pipe_surface *dstDepthSurf = dstDepthRb ? dstDepthRb->surface : NULL; struct gl_renderbuffer *srcStencilRb = readFB->Attachment[BUFFER_STENCIL].Renderbuffer; struct gl_renderbuffer *dstStencilRb = drawFB->Attachment[BUFFER_STENCIL].Renderbuffer; struct pipe_surface *dstStencilSurf = dstStencilRb ? dstStencilRb->surface : NULL; if (_mesa_has_depthstencil_combined(readFB) && _mesa_has_depthstencil_combined(drawFB)) { blit.mask = 0; if (mask & GL_DEPTH_BUFFER_BIT) blit.mask |= PIPE_MASK_Z; if (mask & GL_STENCIL_BUFFER_BIT) blit.mask |= PIPE_MASK_S; blit.dst.resource = dstDepthSurf->texture; blit.dst.level = dstDepthSurf->u.tex.level; blit.dst.box.z = dstDepthSurf->u.tex.first_layer; blit.dst.format = dstDepthSurf->format; blit.src.resource = srcDepthRb->texture; blit.src.level = srcDepthRb->surface->u.tex.level; blit.src.box.z = srcDepthRb->surface->u.tex.first_layer; blit.src.format = srcDepthRb->surface->format; ctx->pipe->blit(ctx->pipe, &blit); } else { /* blitting depth and stencil separately */ if (mask & GL_DEPTH_BUFFER_BIT) { blit.mask = PIPE_MASK_Z; blit.dst.resource = dstDepthSurf->texture; blit.dst.level = dstDepthSurf->u.tex.level; blit.dst.box.z = dstDepthSurf->u.tex.first_layer; blit.dst.format = dstDepthSurf->format; blit.src.resource = srcDepthRb->texture; blit.src.level = srcDepthRb->surface->u.tex.level; blit.src.box.z = srcDepthRb->surface->u.tex.first_layer; blit.src.format = srcDepthRb->surface->format; ctx->pipe->blit(ctx->pipe, &blit); } if (mask & GL_STENCIL_BUFFER_BIT) { blit.mask = PIPE_MASK_S; blit.dst.resource = dstStencilSurf->texture; blit.dst.level = dstStencilSurf->u.tex.level; blit.dst.box.z = dstStencilSurf->u.tex.first_layer; blit.dst.format = dstStencilSurf->format; blit.src.resource = srcStencilRb->texture; blit.src.level = srcStencilRb->surface->u.tex.level; blit.src.box.z = srcStencilRb->surface->u.tex.first_layer; blit.src.format = srcStencilRb->surface->format; ctx->pipe->blit(ctx->pipe, &blit); } } } } static ALWAYS_INLINE void blit_framebuffer(struct gl_context *ctx, struct gl_framebuffer *readFb, struct gl_framebuffer *drawFb, GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1, GLint dstX0, GLint dstY0, GLint dstX1, GLint dstY1, GLbitfield mask, GLenum filter, bool no_error, const char *func) { FLUSH_VERTICES(ctx, 0, 0); if (!readFb || !drawFb) { /* This will normally never happen but someday we may want to * support MakeCurrent() with no drawables. */ return; } /* Update completeness status of readFb and drawFb. */ _mesa_update_framebuffer(ctx, readFb, drawFb); /* Make sure drawFb has an initialized bounding box. */ _mesa_update_draw_buffer_bounds(ctx, drawFb); if (!no_error) { const GLbitfield legalMaskBits = (GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT); /* check for complete framebuffers */ if (drawFb->_Status != GL_FRAMEBUFFER_COMPLETE_EXT || readFb->_Status != GL_FRAMEBUFFER_COMPLETE_EXT) { _mesa_error(ctx, GL_INVALID_FRAMEBUFFER_OPERATION_EXT, "%s(incomplete draw/read buffers)", func); return; } if (!is_valid_blit_filter(ctx, filter)) { _mesa_error(ctx, GL_INVALID_ENUM, "%s(invalid filter %s)", func, _mesa_enum_to_string(filter)); return; } if ((filter == GL_SCALED_RESOLVE_FASTEST_EXT || filter == GL_SCALED_RESOLVE_NICEST_EXT) && (readFb->Visual.samples == 0 || drawFb->Visual.samples > 0)) { _mesa_error(ctx, GL_INVALID_OPERATION, "%s(%s: invalid samples)", func, _mesa_enum_to_string(filter)); return; } if (mask & ~legalMaskBits) { _mesa_error(ctx, GL_INVALID_VALUE, "%s(invalid mask bits set)", func); return; } /* depth/stencil must be blitted with nearest filtering */ if ((mask & (GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT)) && filter != GL_NEAREST) { _mesa_error(ctx, GL_INVALID_OPERATION, "%s(depth/stencil requires GL_NEAREST filter)", func); return; } if (_mesa_is_gles3(ctx)) { /* Page 194 (page 206 of the PDF) in section 4.3.2 of the OpenGL ES * 3.0.1 spec says: * * "If SAMPLE_BUFFERS for the draw framebuffer is greater than * zero, an INVALID_OPERATION error is generated." */ if (drawFb->Visual.samples > 0) { _mesa_error(ctx, GL_INVALID_OPERATION, "%s(destination samples must be 0)", func); return; } /* Page 194 (page 206 of the PDF) in section 4.3.2 of the OpenGL ES * 3.0.1 spec says: * * "If SAMPLE_BUFFERS for the read framebuffer is greater than * zero, no copy is performed and an INVALID_OPERATION error is * generated if the formats of the read and draw framebuffers are * not identical or if the source and destination rectangles are * not defined with the same (X0, Y0) and (X1, Y1) bounds." * * The format check was made above because desktop OpenGL has the same * requirement. */ if (readFb->Visual.samples > 0 && (srcX0 != dstX0 || srcY0 != dstY0 || srcX1 != dstX1 || srcY1 != dstY1)) { _mesa_error(ctx, GL_INVALID_OPERATION, "%s(bad src/dst multisample region)", func); return; } } else { if (readFb->Visual.samples > 0 && drawFb->Visual.samples > 0 && readFb->Visual.samples != drawFb->Visual.samples) { _mesa_error(ctx, GL_INVALID_OPERATION, "%s(mismatched samples)", func); return; } /* extra checks for multisample copies... */ if ((readFb->Visual.samples > 0 || drawFb->Visual.samples > 0) && (filter == GL_NEAREST || filter == GL_LINEAR)) { /* src and dest region sizes must be the same */ if (abs(srcX1 - srcX0) != abs(dstX1 - dstX0) || abs(srcY1 - srcY0) != abs(dstY1 - dstY0)) { _mesa_error(ctx, GL_INVALID_OPERATION, "%s(bad src/dst multisample region sizes)", func); return; } } } } /* get color read/draw renderbuffers */ if (mask & GL_COLOR_BUFFER_BIT) { const GLuint numColorDrawBuffers = drawFb->_NumColorDrawBuffers; const struct gl_renderbuffer *colorReadRb = readFb->_ColorReadBuffer; /* From the EXT_framebuffer_object spec: * * "If a buffer is specified in and does not exist in both * the read and draw framebuffers, the corresponding bit is silently * ignored." */ if (!colorReadRb || numColorDrawBuffers == 0) { mask &= ~GL_COLOR_BUFFER_BIT; } else if (!no_error) { if (!validate_color_buffer(ctx, readFb, drawFb, filter, func)) return; } } if (mask & GL_STENCIL_BUFFER_BIT) { struct gl_renderbuffer *readRb = readFb->Attachment[BUFFER_STENCIL].Renderbuffer; struct gl_renderbuffer *drawRb = drawFb->Attachment[BUFFER_STENCIL].Renderbuffer; /* From the EXT_framebuffer_object spec: * * "If a buffer is specified in and does not exist in both * the read and draw framebuffers, the corresponding bit is silently * ignored." */ if ((readRb == NULL) || (drawRb == NULL)) { mask &= ~GL_STENCIL_BUFFER_BIT; } else if (!no_error) { if (!validate_stencil_buffer(ctx, readFb, drawFb, func)) return; } } if (mask & GL_DEPTH_BUFFER_BIT) { struct gl_renderbuffer *readRb = readFb->Attachment[BUFFER_DEPTH].Renderbuffer; struct gl_renderbuffer *drawRb = drawFb->Attachment[BUFFER_DEPTH].Renderbuffer; /* From the EXT_framebuffer_object spec: * * "If a buffer is specified in and does not exist in both * the read and draw framebuffers, the corresponding bit is silently * ignored." */ if ((readRb == NULL) || (drawRb == NULL)) { mask &= ~GL_DEPTH_BUFFER_BIT; } else if (!no_error) { if (!validate_depth_buffer(ctx, readFb, drawFb, func)) return; } } /* Debug code */ if (DEBUG_BLIT) { const struct gl_renderbuffer *colorReadRb = readFb->_ColorReadBuffer; const struct gl_renderbuffer *colorDrawRb = NULL; GLuint i = 0; printf("%s(%d, %d, %d, %d, %d, %d, %d, %d," " 0x%x, 0x%x)\n", func, srcX0, srcY0, srcX1, srcY1, dstX0, dstY0, dstX1, dstY1, mask, filter); if (colorReadRb) { const struct gl_renderbuffer_attachment *att; att = find_attachment(readFb, colorReadRb); printf(" Src FBO %u RB %u (%dx%d) ", readFb->Name, colorReadRb->Name, colorReadRb->Width, colorReadRb->Height); if (att && att->Texture) { printf("Tex %u tgt 0x%x level %u face %u", att->Texture->Name, att->Texture->Target, att->TextureLevel, att->CubeMapFace); } printf("\n"); /* Print all active color render buffers */ for (i = 0; i < drawFb->_NumColorDrawBuffers; i++) { colorDrawRb = drawFb->_ColorDrawBuffers[i]; if (!colorDrawRb) continue; att = find_attachment(drawFb, colorDrawRb); printf(" Dst FBO %u RB %u (%dx%d) ", drawFb->Name, colorDrawRb->Name, colorDrawRb->Width, colorDrawRb->Height); if (att && att->Texture) { printf("Tex %u tgt 0x%x level %u face %u", att->Texture->Name, att->Texture->Target, att->TextureLevel, att->CubeMapFace); } printf("\n"); } } } if (!mask || (srcX1 - srcX0) == 0 || (srcY1 - srcY0) == 0 || (dstX1 - dstX0) == 0 || (dstY1 - dstY0) == 0) { return; } do_blit_framebuffer(ctx, readFb, drawFb, srcX0, srcY0, srcX1, srcY1, dstX0, dstY0, dstX1, dstY1, mask, filter); } static void blit_framebuffer_err(struct gl_context *ctx, struct gl_framebuffer *readFb, struct gl_framebuffer *drawFb, GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1, GLint dstX0, GLint dstY0, GLint dstX1, GLint dstY1, GLbitfield mask, GLenum filter, const char *func) { /* We are wrapping the err variant of the always inlined * blit_framebuffer() to avoid inlining it in every caller. */ blit_framebuffer(ctx, readFb, drawFb, srcX0, srcY0, srcX1, srcY1, dstX0, dstY0, dstX1, dstY1, mask, filter, false, func); } /** * Blit rectangular region, optionally from one framebuffer to another. * * Note, if the src buffer is multisampled and the dest is not, this is * when the samples must be resolved to a single color. */ void GLAPIENTRY _mesa_BlitFramebuffer_no_error(GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1, GLint dstX0, GLint dstY0, GLint dstX1, GLint dstY1, GLbitfield mask, GLenum filter) { GET_CURRENT_CONTEXT(ctx); blit_framebuffer(ctx, ctx->ReadBuffer, ctx->DrawBuffer, srcX0, srcY0, srcX1, srcY1, dstX0, dstY0, dstX1, dstY1, mask, filter, true, "glBlitFramebuffer"); } void GLAPIENTRY _mesa_BlitFramebuffer(GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1, GLint dstX0, GLint dstY0, GLint dstX1, GLint dstY1, GLbitfield mask, GLenum filter) { GET_CURRENT_CONTEXT(ctx); if (MESA_VERBOSE & VERBOSE_API) _mesa_debug(ctx, "glBlitFramebuffer(%d, %d, %d, %d, " " %d, %d, %d, %d, 0x%x, %s)\n", srcX0, srcY0, srcX1, srcY1, dstX0, dstY0, dstX1, dstY1, mask, _mesa_enum_to_string(filter)); blit_framebuffer_err(ctx, ctx->ReadBuffer, ctx->DrawBuffer, srcX0, srcY0, srcX1, srcY1, dstX0, dstY0, dstX1, dstY1, mask, filter, "glBlitFramebuffer"); } static ALWAYS_INLINE void blit_named_framebuffer(struct gl_context *ctx, GLuint readFramebuffer, GLuint drawFramebuffer, GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1, GLint dstX0, GLint dstY0, GLint dstX1, GLint dstY1, GLbitfield mask, GLenum filter, bool no_error) { struct gl_framebuffer *readFb, *drawFb; /* * According to PDF page 533 of the OpenGL 4.5 core spec (30.10.2014, * Section 18.3 Copying Pixels): * "... if readFramebuffer or drawFramebuffer is zero (for * BlitNamedFramebuffer), then the default read or draw framebuffer is * used as the corresponding source or destination framebuffer, * respectively." */ if (readFramebuffer) { if (no_error) { readFb = _mesa_lookup_framebuffer(ctx, readFramebuffer); } else { readFb = _mesa_lookup_framebuffer_err(ctx, readFramebuffer, "glBlitNamedFramebuffer"); if (!readFb) return; } } else { readFb = ctx->WinSysReadBuffer; } if (drawFramebuffer) { if (no_error) { drawFb = _mesa_lookup_framebuffer(ctx, drawFramebuffer); } else { drawFb = _mesa_lookup_framebuffer_err(ctx, drawFramebuffer, "glBlitNamedFramebuffer"); if (!drawFb) return; } } else { drawFb = ctx->WinSysDrawBuffer; } blit_framebuffer(ctx, readFb, drawFb, srcX0, srcY0, srcX1, srcY1, dstX0, dstY0, dstX1, dstY1, mask, filter, no_error, "glBlitNamedFramebuffer"); } void GLAPIENTRY _mesa_BlitNamedFramebuffer_no_error(GLuint readFramebuffer, GLuint drawFramebuffer, GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1, GLint dstX0, GLint dstY0, GLint dstX1, GLint dstY1, GLbitfield mask, GLenum filter) { GET_CURRENT_CONTEXT(ctx); blit_named_framebuffer(ctx, readFramebuffer, drawFramebuffer, srcX0, srcY0, srcX1, srcY1, dstX0, dstY0, dstX1, dstY1, mask, filter, true); } void GLAPIENTRY _mesa_BlitNamedFramebuffer(GLuint readFramebuffer, GLuint drawFramebuffer, GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1, GLint dstX0, GLint dstY0, GLint dstX1, GLint dstY1, GLbitfield mask, GLenum filter) { GET_CURRENT_CONTEXT(ctx); if (MESA_VERBOSE & VERBOSE_API) _mesa_debug(ctx, "glBlitNamedFramebuffer(%u %u %d, %d, %d, %d, " " %d, %d, %d, %d, 0x%x, %s)\n", readFramebuffer, drawFramebuffer, srcX0, srcY0, srcX1, srcY1, dstX0, dstY0, dstX1, dstY1, mask, _mesa_enum_to_string(filter)); blit_named_framebuffer(ctx, readFramebuffer, drawFramebuffer, srcX0, srcY0, srcX1, srcY1, dstX0, dstY0, dstX1, dstY1, mask, filter, false); }