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Diffstat (limited to 'src/mesa/main/teximage.c')
-rw-r--r--src/mesa/main/teximage.c118
1 files changed, 73 insertions, 45 deletions
diff --git a/src/mesa/main/teximage.c b/src/mesa/main/teximage.c
index 29b721d0bee..9b7a0215619 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. <pixels> 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. <pixels> 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. <pixels> 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);
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-15 00:08:35 +0000