From bab484a59b21fff84579a492d079d46e27d486dd Mon Sep 17 00:00:00 2001 From: Brian Paul Date: Tue, 20 Jul 2010 08:40:19 -0600 Subject: mesa: call ctx->Driver.ChooseTextureFormat() only when necessary. When defining mipmap level 'L' and level L-1 exists and the new level's internalFormat matches level L-1's internalFormat, then use the same hw format. Otherwise, do the regular ctx->Driver.ChooseTextureFormat() call. This avoids a problem where we end up choosing different hw formats for different mipmap levels depending on how the levels are defined (glTexImage vs. glCopyTexImage vs. glGenerateMipmap, etc). The root problem is the ChooseTextureFormat() implementation in some drivers uses the user's glTexImage format/type parameters in the choosing heuristic. Later mipmap levels might be generated with different calls (ex: glCopyTexImage()) so we don't always have format/type info and the driver may choose a different format. For more background info see the July 2010 mesa-dev thread "Bug in _mesa_meta_GenerateMipmap" --- src/mesa/main/teximage.c | 118 +++++++++++++++++++++++++++++------------------ 1 file changed, 73 insertions(+), 45 deletions(-) (limited to 'src/mesa/main/teximage.c') diff --git a/src/mesa/main/teximage.c b/src/mesa/main/teximage.c index 29b721d0be..9b7a021561 100644 --- a/src/mesa/main/teximage.c +++ b/src/mesa/main/teximage.c @@ -2183,6 +2183,45 @@ override_internal_format(GLenum internalFormat, GLint width, GLint height) } +/** + * Choose the actual hardware format for a texture image. + * Try to use the same format as the previous image level when possible. + * Otherwise, ask the driver for the best format. + * It's important to try to choose a consistant format for all levels + * for efficient texture memory layout/allocation. In particular, this + * comes up during automatic mipmap generation. + */ +void +_mesa_choose_texture_format(GLcontext *ctx, + struct gl_texture_object *texObj, + struct gl_texture_image *texImage, + GLenum target, GLint level, + GLenum internalFormat, GLenum format, GLenum type) +{ + /* see if we've already chosen a format for the previous level */ + if (level > 0) { + struct gl_texture_image *prevImage = + _mesa_select_tex_image(ctx, texObj, target, level - 1); + /* See if the prev level is defined and has an internal format which + * matches the new internal format. + */ + if (prevImage && + prevImage->Width > 0 && + prevImage->InternalFormat == internalFormat) { + /* use the same format */ + texImage->TexFormat = prevImage->TexFormat; + return; + } + } + + /* choose format from scratch */ + texImage->TexFormat = ctx->Driver.ChooseTextureFormat(ctx, internalFormat, + format, type); + ASSERT(texImage->TexFormat != MESA_FORMAT_NONE); +} + + + /* * Called from the API. Note that width includes the border. */ @@ -2243,11 +2282,8 @@ _mesa_TexImage1D( GLenum target, GLint level, GLint internalFormat, postConvWidth, 1, 1, border, internalFormat); - /* Choose actual texture format */ - texImage->TexFormat = - ctx->Driver.ChooseTextureFormat(ctx, internalFormat, - format, type); - ASSERT(texImage->TexFormat != MESA_FORMAT_NONE); + _mesa_choose_texture_format(ctx, texObj, texImage, target, level, + internalFormat, format, type); /* Give the texture to the driver. may be null. */ ASSERT(ctx->Driver.TexImage1D); @@ -2282,12 +2318,14 @@ _mesa_TexImage1D( GLenum target, GLint level, GLint internalFormat, } else { /* no error, set the tex image parameters */ + struct gl_texture_object *texObj = + _mesa_get_current_tex_object(ctx, target); ASSERT(texImage); _mesa_init_teximage_fields(ctx, target, texImage, postConvWidth, 1, 1, border, internalFormat); - texImage->TexFormat = - ctx->Driver.ChooseTextureFormat(ctx, internalFormat, format, type); + _mesa_choose_texture_format(ctx, texObj, texImage, target, level, + internalFormat, format, type); } } else { @@ -2363,11 +2401,8 @@ _mesa_TexImage2D( GLenum target, GLint level, GLint internalFormat, postConvWidth, postConvHeight, 1, border, internalFormat); - /* Choose actual texture format */ - texImage->TexFormat = - ctx->Driver.ChooseTextureFormat(ctx, internalFormat, - format, type); - ASSERT(texImage->TexFormat != MESA_FORMAT_NONE); + _mesa_choose_texture_format(ctx, texObj, texImage, target, level, + internalFormat, format, type); /* Give the texture to the driver. may be null. */ ASSERT(ctx->Driver.TexImage2D); @@ -2409,11 +2444,13 @@ _mesa_TexImage2D( GLenum target, GLint level, GLint internalFormat, } else { /* no error, set the tex image parameters */ + struct gl_texture_object *texObj = + _mesa_get_current_tex_object(ctx, target); _mesa_init_teximage_fields(ctx, target, texImage, postConvWidth, postConvHeight, 1, border, internalFormat); - texImage->TexFormat = - ctx->Driver.ChooseTextureFormat(ctx, internalFormat, format, type); + _mesa_choose_texture_format(ctx, texObj, texImage, target, level, + internalFormat, format, type); } } else { @@ -2479,11 +2516,8 @@ _mesa_TexImage3D( GLenum target, GLint level, GLint internalFormat, width, height, depth, border, internalFormat); - /* Choose actual texture format */ - texImage->TexFormat = - ctx->Driver.ChooseTextureFormat(ctx, internalFormat, - format, type); - ASSERT(texImage->TexFormat != MESA_FORMAT_NONE); + _mesa_choose_texture_format(ctx, texObj, texImage, target, level, + internalFormat, format, type); /* Give the texture to the driver. may be null. */ ASSERT(ctx->Driver.TexImage3D); @@ -2520,10 +2554,12 @@ _mesa_TexImage3D( GLenum target, GLint level, GLint internalFormat, } else { /* no error, set the tex image parameters */ + struct gl_texture_object *texObj = + _mesa_get_current_tex_object(ctx, target); _mesa_init_teximage_fields(ctx, target, texImage, width, height, depth, border, internalFormat); - texImage->TexFormat = - ctx->Driver.ChooseTextureFormat(ctx, internalFormat, format, type); + _mesa_choose_texture_format(ctx, texObj, texImage, target, level, + internalFormat, format, type); } } else { @@ -2836,11 +2872,8 @@ _mesa_CopyTexImage1D( GLenum target, GLint level, _mesa_init_teximage_fields(ctx, target, texImage, postConvWidth, 1, 1, border, internalFormat); - /* Choose actual texture format */ - texImage->TexFormat = - ctx->Driver.ChooseTextureFormat(ctx, internalFormat, - GL_NONE, GL_NONE); - ASSERT(texImage->TexFormat != MESA_FORMAT_NONE); + _mesa_choose_texture_format(ctx, texObj, texImage, target, level, + internalFormat, GL_NONE, GL_NONE); ASSERT(ctx->Driver.CopyTexImage1D); ctx->Driver.CopyTexImage1D(ctx, target, level, internalFormat, @@ -2917,11 +2950,8 @@ _mesa_CopyTexImage2D( GLenum target, GLint level, GLenum internalFormat, postConvWidth, postConvHeight, 1, border, internalFormat); - /* Choose actual texture format */ - texImage->TexFormat = - ctx->Driver.ChooseTextureFormat(ctx, internalFormat, - GL_NONE, GL_NONE); - ASSERT(texImage->TexFormat != MESA_FORMAT_NONE); + _mesa_choose_texture_format(ctx, texObj, texImage, target, level, + internalFormat, GL_NONE, GL_NONE); ASSERT(ctx->Driver.CopyTexImage2D); ctx->Driver.CopyTexImage2D(ctx, target, level, internalFormat, @@ -3446,11 +3476,8 @@ _mesa_CompressedTexImage1DARB(GLenum target, GLint level, _mesa_init_teximage_fields(ctx, target, texImage, width, 1, 1, border, internalFormat); - /* Choose actual texture format */ - texImage->TexFormat = - ctx->Driver.ChooseTextureFormat(ctx, internalFormat, - GL_NONE, GL_NONE); - ASSERT(texImage->TexFormat != MESA_FORMAT_NONE); + _mesa_choose_texture_format(ctx, texObj, texImage, target, level, + internalFormat, GL_NONE, GL_NONE); ASSERT(ctx->Driver.CompressedTexImage1D); ctx->Driver.CompressedTexImage1D(ctx, target, level, @@ -3498,6 +3525,8 @@ _mesa_CompressedTexImage1DARB(GLenum target, GLint level, texImage = _mesa_select_tex_image(ctx, texObj, target, level); _mesa_init_teximage_fields(ctx, target, texImage, width, 1, 1, border, internalFormat); + _mesa_choose_texture_format(ctx, texObj, texImage, target, level, + internalFormat, GL_NONE, GL_NONE); } _mesa_unlock_texture(ctx, texObj); } @@ -3573,11 +3602,8 @@ _mesa_CompressedTexImage2DARB(GLenum target, GLint level, _mesa_init_teximage_fields(ctx, target, texImage, width, height, 1, border, internalFormat); - /* Choose actual texture format */ - texImage->TexFormat = - ctx->Driver.ChooseTextureFormat(ctx, internalFormat, - GL_NONE, GL_NONE); - ASSERT(texImage->TexFormat != MESA_FORMAT_NONE); + _mesa_choose_texture_format(ctx, texObj, texImage, target, level, + internalFormat, GL_NONE, GL_NONE); ASSERT(ctx->Driver.CompressedTexImage2D); ctx->Driver.CompressedTexImage2D(ctx, target, level, @@ -3627,6 +3653,8 @@ _mesa_CompressedTexImage2DARB(GLenum target, GLint level, texImage = _mesa_select_tex_image(ctx, texObj, target, level); _mesa_init_teximage_fields(ctx, target, texImage, width, height, 1, border, internalFormat); + _mesa_choose_texture_format(ctx, texObj, texImage, target, level, + internalFormat, GL_NONE, GL_NONE); } _mesa_unlock_texture(ctx, texObj); } @@ -3683,10 +3711,8 @@ _mesa_CompressedTexImage3DARB(GLenum target, GLint level, border, internalFormat); /* Choose actual texture format */ - texImage->TexFormat = - ctx->Driver.ChooseTextureFormat(ctx, internalFormat, - GL_NONE, GL_NONE); - ASSERT(texImage->TexFormat != MESA_FORMAT_NONE); + _mesa_choose_texture_format(ctx, texObj, texImage, target, level, + internalFormat, GL_NONE, GL_NONE); ASSERT(ctx->Driver.CompressedTexImage3D); ctx->Driver.CompressedTexImage3D(ctx, target, level, @@ -3735,6 +3761,8 @@ _mesa_CompressedTexImage3DARB(GLenum target, GLint level, texImage = _mesa_select_tex_image(ctx, texObj, target, level); _mesa_init_teximage_fields(ctx, target, texImage, width, height, depth, border, internalFormat); + _mesa_choose_texture_format(ctx, texObj, texImage, target, level, + internalFormat, GL_NONE, GL_NONE); } _mesa_unlock_texture(ctx, texObj); } -- cgit v1.2.3