diff options
Diffstat (limited to 'mesalib/src/mesa/drivers/common/meta_generate_mipmap.c')
| -rw-r--r-- | mesalib/src/mesa/drivers/common/meta_generate_mipmap.c | 383 |
1 files changed, 383 insertions, 0 deletions
diff --git a/mesalib/src/mesa/drivers/common/meta_generate_mipmap.c b/mesalib/src/mesa/drivers/common/meta_generate_mipmap.c new file mode 100644 index 000000000..3db073ab1 --- /dev/null +++ b/mesalib/src/mesa/drivers/common/meta_generate_mipmap.c @@ -0,0 +1,383 @@ +/* + * 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/buffers.h" +#include "main/enums.h" +#include "main/enable.h" +#include "main/fbobject.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" + +/** + * Bind a particular texture level/layer to mipmap->FBO's GL_COLOR_ATTACHMENT0. + */ +static void +bind_fbo_image(struct gl_texture_object *texObj, GLenum target, + GLuint level, GLuint layer) +{ + switch (target) { + case GL_TEXTURE_1D: + _mesa_FramebufferTexture1D(GL_FRAMEBUFFER, + GL_COLOR_ATTACHMENT0, + target, + texObj->Name, + level); + break; + case GL_TEXTURE_1D_ARRAY: + case GL_TEXTURE_2D_ARRAY: + case GL_TEXTURE_3D: + _mesa_FramebufferTextureLayer(GL_FRAMEBUFFER, + GL_COLOR_ATTACHMENT0, + texObj->Name, + level, + layer); + break; + default: /* 2D / cube */ + _mesa_FramebufferTexture2D(GL_FRAMEBUFFER, + GL_COLOR_ATTACHMENT0, + target, + texObj->Name, + level); + } +} + +/** + * 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) +{ + const GLuint fboSave = ctx->DrawBuffer->Name; + 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_lookup_enum_by_nr(target)); + return true; + } + + srcLevel = texObj->BaseLevel; + baseImage = _mesa_select_tex_image(ctx, 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->FBO) + _mesa_GenFramebuffers(1, &mipmap->FBO); + _mesa_BindFramebuffer(GL_FRAMEBUFFER_EXT, mipmap->FBO); + + bind_fbo_image(texObj, target, srcLevel, 0); + + status = _mesa_CheckFramebufferStatus(GL_FRAMEBUFFER_EXT); + + _mesa_BindFramebuffer(GL_FRAMEBUFFER_EXT, fboSave); + + 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 gen_mipmap_state *mipmap) +{ + if (mipmap->VAO == 0) + return; + _mesa_DeleteVertexArrays(1, &mipmap->VAO); + mipmap->VAO = 0; + _mesa_DeleteBuffers(1, &mipmap->VBO); + mipmap->VBO = 0; + + _mesa_meta_blit_shader_table_cleanup(&mipmap->shaders); +} + +static GLboolean +prepare_mipmap_level(struct gl_context *ctx, + struct gl_texture_object *texObj, GLuint level, + GLsizei width, GLsizei height, GLsizei depth, + GLenum intFormat, mesa_format format) +{ + if (texObj->Target == GL_TEXTURE_1D_ARRAY) { + /* Work around Mesa expecting the number of array slices in "height". */ + height = depth; + depth = 1; + } + + return _mesa_prepare_mipmap_level(ctx, texObj, level, width, height, depth, + 0, intFormat, format); +} + +/** + * Called via ctx->Driver.GenerateMipmap() + * Note: We don't yet support 3D textures, 1D/2D array 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 GLuint fboSave = ctx->DrawBuffer->Name; + const GLuint currentTexUnitSave = ctx->Texture.CurrentUnit; + const GLboolean use_glsl_version = ctx->Extensions.ARB_vertex_shader && + ctx->Extensions.ARB_fragment_shader; + GLenum faceTarget; + GLuint dstLevel; + GLuint samplerSave; + + 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); + + /* Choose between glsl version and fixed function version of + * GenerateMipmap function. + */ + if (use_glsl_version) { + _mesa_meta_setup_vertex_objects(&mipmap->VAO, &mipmap->VBO, true, + 2, 3, 0); + _mesa_meta_setup_blit_shader(ctx, target, &mipmap->shaders); + } else { + _mesa_meta_setup_ff_tnl_for_blit(&mipmap->VAO, &mipmap->VBO, 3); + _mesa_set_enable(ctx, target, GL_TRUE); + } + + samplerSave = ctx->Texture.Unit[ctx->Texture.CurrentUnit].Sampler ? + ctx->Texture.Unit[ctx->Texture.CurrentUnit].Sampler->Name : 0; + + if (currentTexUnitSave != 0) + _mesa_BindTexture(target, texObj->Name); + + if (!mipmap->Sampler) { + _mesa_GenSamplers(1, &mipmap->Sampler); + _mesa_BindSampler(ctx->Texture.CurrentUnit, mipmap->Sampler); + + _mesa_SamplerParameteri(mipmap->Sampler, + GL_TEXTURE_MIN_FILTER, + GL_LINEAR_MIPMAP_LINEAR); + _mesa_SamplerParameteri(mipmap->Sampler, GL_TEXTURE_MAG_FILTER, GL_LINEAR); + _mesa_SamplerParameteri(mipmap->Sampler, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE); + _mesa_SamplerParameteri(mipmap->Sampler, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE); + _mesa_SamplerParameteri(mipmap->Sampler, GL_TEXTURE_WRAP_R, GL_CLAMP_TO_EDGE); + + /* We don't want to encode or decode sRGB values; treat them as linear. + * This is not technically correct for GLES3 but we don't get any API + * error at the moment. + */ + if (ctx->Extensions.EXT_texture_sRGB_decode) { + _mesa_SamplerParameteri(mipmap->Sampler, GL_TEXTURE_SRGB_DECODE_EXT, + GL_SKIP_DECODE_EXT); + } + } else { + _mesa_BindSampler(ctx->Texture.CurrentUnit, mipmap->Sampler); + } + + assert(mipmap->FBO != 0); + _mesa_BindFramebuffer(GL_FRAMEBUFFER_EXT, mipmap->FBO); + + _mesa_TexParameteri(target, GL_GENERATE_MIPMAP, GL_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); + + for (dstLevel = baseLevel + 1; dstLevel <= maxLevel; dstLevel++) { + const struct gl_texture_image *srcImage; + const GLuint srcLevel = dstLevel - 1; + GLuint layer; + GLsizei srcWidth, srcHeight, srcDepth; + GLsizei dstWidth, dstHeight, dstDepth; + + srcImage = _mesa_select_tex_image(ctx, 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_TexParameteri(target, GL_TEXTURE_MAX_LEVEL, dstLevel); + + if (!prepare_mipmap_level(ctx, texObj, dstLevel, + dstWidth, dstHeight, dstDepth, + srcImage->InternalFormat, + srcImage->TexFormat)) { + /* All done. We either ran out of memory or we would go beyond the + * last valid level of an immutable texture if we continued. + */ + break; + } + + /* limit minification to src level */ + _mesa_TexParameteri(target, GL_TEXTURE_MAX_LEVEL, srcLevel); + + /* 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, 1, /* width, height never used here */ + verts[0].tex, + verts[1].tex, + verts[2].tex, + verts[3].tex); + + /* upload vertex data */ + _mesa_BufferData(GL_ARRAY_BUFFER_ARB, sizeof(verts), + verts, GL_DYNAMIC_DRAW_ARB); + + bind_fbo_image(texObj, faceTarget, dstLevel, layer); + + /* sanity check */ + if (_mesa_CheckFramebufferStatus(GL_FRAMEBUFFER) != + 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_BindSampler(ctx->Texture.CurrentUnit, samplerSave); + + _mesa_meta_end(ctx); + + _mesa_TexParameteri(target, GL_TEXTURE_MAX_LEVEL, maxLevelSave); + if (genMipmapSave) + _mesa_TexParameteri(target, GL_GENERATE_MIPMAP, genMipmapSave); + + _mesa_BindFramebuffer(GL_FRAMEBUFFER_EXT, fboSave); +} |