/* * Mesa 3-D graphics library * * Copyright (C) 2009 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. */ /** * Meta operations. Some GL operations can be expressed in terms of * other GL operations. For example, glBlitFramebuffer() can be done * with texture mapping and glClear() can be done with polygon rendering. * * \author Brian Paul */ #include "main/arrayobj.h" #include "main/blend.h" #include "main/buffers.h" #include "main/enums.h" #include "main/enable.h" #include "main/fbobject.h" #include "main/framebuffer.h" #include "main/macros.h" #include "main/mipmap.h" #include "main/teximage.h" #include "main/texobj.h" #include "main/texparam.h" #include "main/varray.h" #include "main/viewport.h" #include "drivers/common/meta.h" #include "program/prog_instruction.h" /** * Check if the call to _mesa_meta_GenerateMipmap() will require a * software fallback. The fallback path will require that the texture * images are mapped. * \return GL_TRUE if a fallback is needed, GL_FALSE otherwise */ static bool fallback_required(struct gl_context *ctx, GLenum target, struct gl_texture_object *texObj) { struct gen_mipmap_state *mipmap = &ctx->Meta->Mipmap; struct gl_texture_image *baseImage; GLuint srcLevel; GLenum status; /* check for fallbacks */ if (target == GL_TEXTURE_3D) { _mesa_perf_debug(ctx, MESA_DEBUG_SEVERITY_HIGH, "glGenerateMipmap() to %s target\n", _mesa_enum_to_string(target)); return true; } srcLevel = texObj->BaseLevel; baseImage = _mesa_select_tex_image(texObj, target, srcLevel); if (!baseImage) { _mesa_perf_debug(ctx, MESA_DEBUG_SEVERITY_HIGH, "glGenerateMipmap() couldn't find base teximage\n"); return true; } if (_mesa_is_format_compressed(baseImage->TexFormat)) { _mesa_perf_debug(ctx, MESA_DEBUG_SEVERITY_HIGH, "glGenerateMipmap() with %s format\n", _mesa_get_format_name(baseImage->TexFormat)); return true; } if (_mesa_get_format_color_encoding(baseImage->TexFormat) == GL_SRGB && !ctx->Extensions.EXT_texture_sRGB_decode) { /* The texture format is sRGB but we can't turn off sRGB->linear * texture sample conversion. So we won't be able to generate the * right colors when rendering. Need to use a fallback. */ _mesa_perf_debug(ctx, MESA_DEBUG_SEVERITY_HIGH, "glGenerateMipmap() of sRGB texture without " "sRGB decode\n"); return true; } /* * Test that we can actually render in the texture's format. */ if (mipmap->fb == NULL) { mipmap->fb = ctx->Driver.NewFramebuffer(ctx, 0xDEADBEEF); if (mipmap->fb == NULL) { _mesa_perf_debug(ctx, MESA_DEBUG_SEVERITY_HIGH, "glGenerateMipmap() ran out of memory\n"); return true; } } _mesa_meta_framebuffer_texture_image(ctx, mipmap->fb, GL_COLOR_ATTACHMENT0, baseImage, 0); status = _mesa_check_framebuffer_status(ctx, mipmap->fb); if (status != GL_FRAMEBUFFER_COMPLETE_EXT) { _mesa_perf_debug(ctx, MESA_DEBUG_SEVERITY_HIGH, "glGenerateMipmap() got incomplete FBO\n"); return true; } return false; } void _mesa_meta_glsl_generate_mipmap_cleanup(struct gl_context *ctx, struct gen_mipmap_state *mipmap) { if (mipmap->VAO == 0) return; _mesa_DeleteVertexArrays(1, &mipmap->VAO); mipmap->VAO = 0; _mesa_reference_buffer_object(ctx, &mipmap->buf_obj, NULL); _mesa_reference_sampler_object(ctx, &mipmap->samp_obj, NULL); _mesa_reference_framebuffer(&mipmap->fb, NULL); _mesa_meta_blit_shader_table_cleanup(ctx, &mipmap->shaders); } /** * Called via ctx->Driver.GenerateMipmap() * Note: We don't yet support 3D textures, or texture borders. */ void _mesa_meta_GenerateMipmap(struct gl_context *ctx, GLenum target, struct gl_texture_object *texObj) { struct gen_mipmap_state *mipmap = &ctx->Meta->Mipmap; struct vertex verts[4]; const GLuint baseLevel = texObj->BaseLevel; const GLuint maxLevel = texObj->MaxLevel; const GLint maxLevelSave = texObj->MaxLevel; const GLboolean genMipmapSave = texObj->GenerateMipmap; const GLboolean use_glsl_version = ctx->Extensions.ARB_vertex_shader && ctx->Extensions.ARB_fragment_shader; GLenum faceTarget; GLuint dstLevel; struct gl_sampler_object *samp_obj_save = NULL; GLint swizzle[4]; GLboolean swizzleSaved = GL_FALSE; /* GLint so the compiler won't complain about type signedness mismatch in * the calls to _mesa_texture_parameteriv below. */ static const GLint always_false = GL_FALSE; static const GLint always_true = GL_TRUE; if (fallback_required(ctx, target, texObj)) { _mesa_generate_mipmap(ctx, target, texObj); return; } if (target >= GL_TEXTURE_CUBE_MAP_POSITIVE_X && target <= GL_TEXTURE_CUBE_MAP_NEGATIVE_Z) { faceTarget = target; target = GL_TEXTURE_CUBE_MAP; } else { faceTarget = target; } _mesa_meta_begin(ctx, MESA_META_ALL & ~MESA_META_DRAW_BUFFERS); _mesa_ColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE); _mesa_Disable(GL_DITHER); /* Choose between glsl version and fixed function version of * GenerateMipmap function. */ if (use_glsl_version) { _mesa_meta_setup_vertex_objects(ctx, &mipmap->VAO, &mipmap->buf_obj, true, 2, 4, 0); _mesa_meta_setup_blit_shader(ctx, target, false, &mipmap->shaders); } else { _mesa_meta_setup_ff_tnl_for_blit(ctx, &mipmap->VAO, &mipmap->buf_obj, 3); _mesa_set_enable(ctx, target, GL_TRUE); } _mesa_reference_sampler_object(ctx, &samp_obj_save, ctx->Texture.Unit[ctx->Texture.CurrentUnit].Sampler); /* We may have been called from glGenerateTextureMipmap with CurrentUnit * still set to 0, so we don't know when we can skip binding the texture. * Assume that _mesa_bind_texture will be fast if we're rebinding the same * texture. */ _mesa_bind_texture(ctx, target, texObj); if (mipmap->samp_obj == NULL) { mipmap->samp_obj = ctx->Driver.NewSamplerObject(ctx, 0xDEADBEEF); if (mipmap->samp_obj == NULL) { /* This is a bit lazy. Flag out of memory, and then don't bother to * clean up. Once out of memory is flagged, the only realistic next * move is to destroy the context. That will trigger all the right * clean up. */ _mesa_error(ctx, GL_OUT_OF_MEMORY, "glGenerateMipmap"); return; } _mesa_set_sampler_filters(ctx, mipmap->samp_obj, GL_LINEAR_MIPMAP_LINEAR, GL_LINEAR); _mesa_set_sampler_wrap(ctx, mipmap->samp_obj, GL_CLAMP_TO_EDGE, GL_CLAMP_TO_EDGE, GL_CLAMP_TO_EDGE); } if (ctx->Extensions.EXT_texture_sRGB_decode) { const struct gl_texture_image *baseImage = _mesa_select_tex_image(texObj, target, texObj->BaseLevel); const bool srgb = _mesa_get_format_color_encoding(baseImage->TexFormat) == GL_SRGB; _mesa_set_sampler_srgb_decode(ctx, mipmap->samp_obj, srgb ? GL_DECODE_EXT : GL_SKIP_DECODE_EXT); _mesa_set_framebuffer_srgb(ctx, srgb); } _mesa_bind_sampler(ctx, ctx->Texture.CurrentUnit, mipmap->samp_obj); assert(mipmap->fb != NULL); _mesa_bind_framebuffers(ctx, mipmap->fb, mipmap->fb); _mesa_texture_parameteriv(ctx, texObj, GL_GENERATE_MIPMAP, &always_false, false); if (texObj->_Swizzle != SWIZZLE_NOOP) { static const GLint swizzleNoop[4] = { GL_RED, GL_GREEN, GL_BLUE, GL_ALPHA }; memcpy(swizzle, texObj->Swizzle, sizeof(swizzle)); swizzleSaved = GL_TRUE; _mesa_texture_parameteriv(ctx, texObj, GL_TEXTURE_SWIZZLE_RGBA, swizzleNoop, false); } /* Silence valgrind warnings about reading uninitialized stack. */ memset(verts, 0, sizeof(verts)); /* setup vertex positions */ verts[0].x = -1.0F; verts[0].y = -1.0F; verts[1].x = 1.0F; verts[1].y = -1.0F; verts[2].x = 1.0F; verts[2].y = 1.0F; verts[3].x = -1.0F; verts[3].y = 1.0F; /* texture is already locked, unlock now */ _mesa_unlock_texture(ctx, texObj); _mesa_prepare_mipmap_levels(ctx, texObj, baseLevel, maxLevel); for (dstLevel = baseLevel + 1; dstLevel <= maxLevel; dstLevel++) { const struct gl_texture_image *srcImage; struct gl_texture_image *dstImage; const GLuint srcLevel = dstLevel - 1; GLuint layer; GLsizei srcWidth, srcHeight, srcDepth; GLsizei dstWidth, dstHeight, dstDepth; srcImage = _mesa_select_tex_image(texObj, faceTarget, srcLevel); assert(srcImage->Border == 0); /* src size */ srcWidth = srcImage->Width; if (target == GL_TEXTURE_1D_ARRAY) { srcHeight = 1; srcDepth = srcImage->Height; } else { srcHeight = srcImage->Height; srcDepth = srcImage->Depth; } /* new dst size */ dstWidth = minify(srcWidth, 1); dstHeight = minify(srcHeight, 1); dstDepth = target == GL_TEXTURE_3D ? minify(srcDepth, 1) : srcDepth; if (dstWidth == srcWidth && dstHeight == srcHeight && dstDepth == srcDepth) { /* all done */ break; } /* Allocate storage for the destination mipmap image(s) */ /* Set MaxLevel large enough to hold the new level when we allocate it */ _mesa_texture_parameteriv(ctx, texObj, GL_TEXTURE_MAX_LEVEL, (GLint *) &dstLevel, false); dstImage = _mesa_select_tex_image(texObj, faceTarget, dstLevel); /* All done. We either ran out of memory or we would go beyond the last * valid level of an immutable texture if we continued. */ if (dstImage == NULL) break; /* limit minification to src level */ _mesa_texture_parameteriv(ctx, texObj, GL_TEXTURE_MAX_LEVEL, (GLint *) &srcLevel, false); /* setup viewport */ _mesa_set_viewport(ctx, 0, 0, 0, dstWidth, dstHeight); _mesa_DrawBuffer(GL_COLOR_ATTACHMENT0); for (layer = 0; layer < dstDepth; ++layer) { /* Setup texture coordinates */ _mesa_meta_setup_texture_coords(faceTarget, layer, 0, 0, /* xoffset, yoffset */ srcWidth, srcHeight, /* img size */ srcWidth, srcHeight, srcDepth, verts[0].tex, verts[1].tex, verts[2].tex, verts[3].tex); /* upload vertex data */ _mesa_buffer_data(ctx, mipmap->buf_obj, GL_NONE, sizeof(verts), verts, GL_DYNAMIC_DRAW, __func__); _mesa_meta_framebuffer_texture_image(ctx, ctx->DrawBuffer, GL_COLOR_ATTACHMENT0, dstImage, layer); /* sanity check */ if (_mesa_check_framebuffer_status(ctx, ctx->DrawBuffer) != GL_FRAMEBUFFER_COMPLETE) { _mesa_problem(ctx, "Unexpected incomplete framebuffer in " "_mesa_meta_GenerateMipmap()"); break; } assert(dstWidth == ctx->DrawBuffer->Width); if (target == GL_TEXTURE_1D_ARRAY) { assert(dstHeight == 1); } else { assert(dstHeight == ctx->DrawBuffer->Height); } _mesa_DrawArrays(GL_TRIANGLE_FAN, 0, 4); } } _mesa_lock_texture(ctx, texObj); /* relock */ _mesa_bind_sampler(ctx, ctx->Texture.CurrentUnit, samp_obj_save); _mesa_reference_sampler_object(ctx, &samp_obj_save, NULL); _mesa_meta_end(ctx); _mesa_texture_parameteriv(ctx, texObj, GL_TEXTURE_MAX_LEVEL, &maxLevelSave, false); if (genMipmapSave) _mesa_texture_parameteriv(ctx, texObj, GL_GENERATE_MIPMAP, &always_true, false); if (swizzleSaved) _mesa_texture_parameteriv(ctx, texObj, GL_TEXTURE_SWIZZLE_RGBA, swizzle, false); }