From e3dc78e57a7effbd30dc9539b3ea05ad85ac34e5 Mon Sep 17 00:00:00 2001 From: Brian Paul Date: Thu, 8 Sep 2011 20:16:18 -0600 Subject: [PATCH] meta: added _mesa_meta_GetTexImage() If the texture is compressed, call the meta decompress_texture_image() function. Otherwise, call the core _mesa_get_teximage() function. --- src/mesa/drivers/common/driverfuncs.c | 2 +- src/mesa/drivers/common/meta.c | 224 ++++++++++++++++++++++++++ src/mesa/drivers/common/meta.h | 7 + 3 files changed, 232 insertions(+), 1 deletion(-) diff --git a/src/mesa/drivers/common/driverfuncs.c b/src/mesa/drivers/common/driverfuncs.c index 6484d284d7d..36ed4f89216 100644 --- a/src/mesa/drivers/common/driverfuncs.c +++ b/src/mesa/drivers/common/driverfuncs.c @@ -94,7 +94,7 @@ _mesa_init_driver_functions(struct dd_function_table *driver) driver->TexSubImage1D = _mesa_store_texsubimage1d; driver->TexSubImage2D = _mesa_store_texsubimage2d; driver->TexSubImage3D = _mesa_store_texsubimage3d; - driver->GetTexImage = _mesa_get_teximage; + driver->GetTexImage = _mesa_meta_GetTexImage; driver->CopyTexSubImage1D = _mesa_meta_CopyTexSubImage1D; driver->CopyTexSubImage2D = _mesa_meta_CopyTexSubImage2D; driver->CopyTexSubImage3D = _mesa_meta_CopyTexSubImage3D; diff --git a/src/mesa/drivers/common/meta.c b/src/mesa/drivers/common/meta.c index a0e9316884a..2ebcd35bd11 100644 --- a/src/mesa/drivers/common/meta.c +++ b/src/mesa/drivers/common/meta.c @@ -59,6 +59,7 @@ #include "main/stencil.h" #include "main/texobj.h" #include "main/texenv.h" +#include "main/texgetimage.h" #include "main/teximage.h" #include "main/texparam.h" #include "main/texstate.h" @@ -259,6 +260,18 @@ struct gen_mipmap_state GLuint FBO; }; + +/** + * State for texture decompression + */ +struct decompress_state +{ + GLuint ArrayObj; + GLuint VBO, FBO, RBO; + GLint Width, Height; +}; + + #define MAX_META_OPS_DEPTH 2 /** * All per-context meta state. @@ -278,6 +291,7 @@ struct gl_meta_state struct drawpix_state DrawPix; /**< For _mesa_meta_DrawPixels() */ struct bitmap_state Bitmap; /**< For _mesa_meta_Bitmap() */ struct gen_mipmap_state Mipmap; /**< For _mesa_meta_GenerateMipmap() */ + struct decompress_state Decompress; /**< For texture decompression */ }; @@ -3023,3 +3037,213 @@ _mesa_meta_CopyTexSubImage3D(struct gl_context *ctx, GLenum target, GLint level, copy_tex_sub_image(ctx, 3, target, level, xoffset, yoffset, zoffset, x, y, width, height); } + + +/** + * Decompress a texture image by drawing a quad with the compressed + * texture and reading the pixels out of the color buffer. + * \param slice which slice of a 3D texture or layer of a 1D/2D texture + * \param destFormat format, ala glReadPixels + * \param destType type, ala glReadPixels + * \param dest destination buffer + * \param destRowLength dest image rowLength (ala GL_PACK_ROW_LENGTH) + */ +static void +decompress_texture_image(struct gl_context *ctx, + struct gl_texture_image *texImage, + GLuint slice, + GLenum destFormat, GLenum destType, + GLvoid *dest, GLint destRowLength) +{ + struct decompress_state *decompress = &ctx->Meta->Decompress; + struct gl_texture_object *texObj = texImage->TexObject; + const GLint width = texImage->Width; + const GLint height = texImage->Height; + const GLenum target = texObj->Target; + GLenum faceTarget; + struct vertex { + GLfloat x, y, tex[3]; + }; + struct vertex verts[4]; + GLuint fboDrawSave, fboReadSave; + + if (slice > 0) { + assert(target == GL_TEXTURE_3D || + target == GL_TEXTURE_2D_ARRAY); + } + + if (target == GL_TEXTURE_CUBE_MAP) { + faceTarget = GL_TEXTURE_CUBE_MAP_POSITIVE_X + texImage->Face; + } + else { + faceTarget = target; + } + + /* save fbo bindings (not saved by _mesa_meta_begin()) */ + fboDrawSave = ctx->DrawBuffer->Name; + fboReadSave = ctx->ReadBuffer->Name; + + _mesa_meta_begin(ctx, MESA_META_ALL); + + /* Create/bind FBO/renderbuffer */ + if (decompress->FBO == 0) { + _mesa_GenFramebuffersEXT(1, &decompress->FBO); + _mesa_GenRenderbuffersEXT(1, &decompress->RBO); + _mesa_BindFramebufferEXT(GL_FRAMEBUFFER_EXT, decompress->FBO); + _mesa_BindRenderbufferEXT(GL_RENDERBUFFER_EXT, decompress->RBO); + _mesa_FramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT, + GL_COLOR_ATTACHMENT0_EXT, + GL_RENDERBUFFER_EXT, + decompress->RBO); + } + else { + _mesa_BindFramebufferEXT(GL_FRAMEBUFFER_EXT, decompress->FBO); + } + + /* alloc dest surface */ + if (width != decompress->Width || height != decompress->Height) { + _mesa_RenderbufferStorageEXT(GL_RENDERBUFFER_EXT, GL_RGBA, + width, height); + decompress->Width = width; + decompress->Height = height; + } + + /* setup VBO data */ + if (decompress->ArrayObj == 0) { + /* create vertex array object */ + _mesa_GenVertexArrays(1, &decompress->ArrayObj); + _mesa_BindVertexArray(decompress->ArrayObj); + + /* create vertex array buffer */ + _mesa_GenBuffersARB(1, &decompress->VBO); + _mesa_BindBufferARB(GL_ARRAY_BUFFER_ARB, decompress->VBO); + _mesa_BufferDataARB(GL_ARRAY_BUFFER_ARB, sizeof(verts), + NULL, GL_DYNAMIC_DRAW_ARB); + + /* setup vertex arrays */ + _mesa_VertexPointer(2, GL_FLOAT, sizeof(struct vertex), OFFSET(x)); + _mesa_TexCoordPointer(3, GL_FLOAT, sizeof(struct vertex), OFFSET(tex)); + _mesa_EnableClientState(GL_VERTEX_ARRAY); + _mesa_EnableClientState(GL_TEXTURE_COORD_ARRAY); + } + else { + _mesa_BindVertexArray(decompress->ArrayObj); + _mesa_BindBufferARB(GL_ARRAY_BUFFER_ARB, decompress->VBO); + } + + setup_texture_coords(faceTarget, slice, width, height, + verts[0].tex, + verts[1].tex, + verts[2].tex, + verts[3].tex); + + /* setup vertex positions */ + verts[0].x = 0.0F; + verts[0].y = 0.0F; + verts[1].x = width; + verts[1].y = 0.0F; + verts[2].x = width; + verts[2].y = height; + verts[3].x = 0.0F; + verts[3].y = height; + + /* upload new vertex data */ + _mesa_BufferSubDataARB(GL_ARRAY_BUFFER_ARB, 0, sizeof(verts), verts); + + /* setup texture state */ + _mesa_BindTexture(target, texObj->Name); + _mesa_Enable(target); + + { + /* save texture object state */ + const GLenum minFilterSave = texObj->Sampler.MinFilter; + const GLenum magFilterSave = texObj->Sampler.MagFilter; + const GLint baseLevelSave = texObj->BaseLevel; + const GLint maxLevelSave = texObj->MaxLevel; + const GLenum wrapSSave = texObj->Sampler.WrapS; + const GLenum wrapTSave = texObj->Sampler.WrapT; + const GLenum srgbSave = texObj->Sampler.sRGBDecode; + + /* restrict sampling to the texture level of interest */ + _mesa_TexParameteri(target, GL_TEXTURE_BASE_LEVEL, texImage->Level); + _mesa_TexParameteri(target, GL_TEXTURE_MAX_LEVEL, texImage->Level); + /* nearest filtering */ + _mesa_TexParameteri(target, GL_TEXTURE_MIN_FILTER, GL_NEAREST); + _mesa_TexParameteri(target, GL_TEXTURE_MAG_FILTER, GL_NEAREST); + + /* No sRGB decode or encode.*/ + if (ctx->Extensions.EXT_texture_sRGB_decode) { + _mesa_TexParameteri(target, GL_TEXTURE_SRGB_DECODE_EXT, + GL_SKIP_DECODE_EXT); + } + if (ctx->Extensions.EXT_framebuffer_sRGB) { + _mesa_Disable(GL_FRAMEBUFFER_SRGB_EXT); + } + + /* render quad w/ texture into renderbuffer */ + _mesa_DrawArrays(GL_TRIANGLE_FAN, 0, 4); + + /* Restore texture object state, the texture binding will + * be restored by _mesa_meta_end(). + */ + _mesa_TexParameteri(target, GL_TEXTURE_MIN_FILTER, minFilterSave); + _mesa_TexParameteri(target, GL_TEXTURE_MAG_FILTER, magFilterSave); + if (target != GL_TEXTURE_RECTANGLE_ARB) { + _mesa_TexParameteri(target, GL_TEXTURE_BASE_LEVEL, baseLevelSave); + _mesa_TexParameteri(target, GL_TEXTURE_MAX_LEVEL, maxLevelSave); + } + _mesa_TexParameteri(target, GL_TEXTURE_WRAP_S, wrapSSave); + _mesa_TexParameteri(target, GL_TEXTURE_WRAP_T, wrapTSave); + if (ctx->Extensions.EXT_texture_sRGB_decode) { + _mesa_TexParameteri(target, GL_TEXTURE_SRGB_DECODE_EXT, srgbSave); + } + } + + /* read pixels from renderbuffer */ + ctx->Pack.RowLength = destRowLength; + _mesa_ReadPixels(0, 0, width, height, destFormat, destType, dest); + + _mesa_meta_end(ctx); + + /* restore fbo bindings */ + if (fboDrawSave == fboReadSave) { + _mesa_BindFramebufferEXT(GL_FRAMEBUFFER_EXT, fboDrawSave); + } + else { + _mesa_BindFramebufferEXT(GL_DRAW_FRAMEBUFFER_EXT, fboDrawSave); + _mesa_BindFramebufferEXT(GL_READ_FRAMEBUFFER_EXT, fboReadSave); + } +} + + +/** + * This is just a wrapper around _mesa_get_tex_image() and + * decompress_texture_image(). Meta functions should not be directly called + * from core Mesa. + */ +void +_mesa_meta_GetTexImage(struct gl_context *ctx, GLenum target, GLint level, + GLenum format, GLenum type, GLvoid *pixels, + struct gl_texture_object *texObj, + struct gl_texture_image *texImage) +{ + /* We can only use the decompress-with-blit method here if the texels are + * unsigned, normalized values. We could handle signed and unnormalized + * with floating point renderbuffers... + */ + if (_mesa_is_format_compressed(texImage->TexFormat) && + _mesa_get_format_datatype(texImage->TexFormat) + == GL_UNSIGNED_NORMALIZED) { + const GLuint slice = 0; /* only 2D compressed textures for now */ + /* Need to unlock the texture here to prevent deadlock... */ + _mesa_unlock_texture(ctx, texObj); + decompress_texture_image(ctx, texImage, slice, format, type, pixels, + ctx->Pack.RowLength); + /* ... and relock it */ + _mesa_lock_texture(ctx, texObj); + } + else { + _mesa_get_teximage(ctx, target, level, format, type, pixels, + texObj, texImage); + } +} diff --git a/src/mesa/drivers/common/meta.h b/src/mesa/drivers/common/meta.h index 9a92613c44c..9d634ae561f 100644 --- a/src/mesa/drivers/common/meta.h +++ b/src/mesa/drivers/common/meta.h @@ -121,4 +121,11 @@ _mesa_meta_CopyTexSubImage3D(struct gl_context *ctx, GLenum target, GLint level, GLint x, GLint y, GLsizei width, GLsizei height); +extern void +_mesa_meta_GetTexImage(struct gl_context *ctx, GLenum target, GLint level, + GLenum format, GLenum type, GLvoid *pixels, + struct gl_texture_object *texObj, + struct gl_texture_image *texImage); + + #endif /* META_H */ -- 2.30.2