/**
* 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;
}
/**
* 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(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)
glGenFramebuffers(1, &mipmap->FBO);
glBindFramebuffer(GL_FRAMEBUFFER, mipmap->FBO);
_mesa_meta_bind_fbo_image(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, baseImage, 0);
status = glCheckFramebufferStatus(GL_FRAMEBUFFER);
glBindFramebuffer(GL_FRAMEBUFFER, fboSave);
if (status != GL_FRAMEBUFFER_COMPLETE) {
_mesa_perf_debug(ctx, MESA_DEBUG_SEVERITY_HIGH,
"glGenerateMipmap() got incomplete FBO\n");
return true;
}
return false;
}
/**
* 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;
/* GL_DRAW_FRAMEBUFFER does not exist in OpenGL ES 1.x, and since
* _mesa_meta_begin hasn't been called yet, we have to work-around API
* difficulties. The whole reason that GL_DRAW_FRAMEBUFFER is used instead
* of GL_FRAMEBUFFER is that the read framebuffer may be different. This
* is moot in OpenGL ES 1.x.
*/
const GLenum fbo_target = ctx->API == API_OPENGLES
? GL_FRAMEBUFFER : GL_DRAW_FRAMEBUFFER;
/* 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->FBO)
_mesa_GenFramebuffers(1, &mipmap->FBO);
_mesa_BindFramebuffer(fbo_target, mipmap->FBO);
_mesa_meta_bind_fbo_image(fbo_target, GL_COLOR_ATTACHMENT0, baseImage, 0);
status = _mesa_CheckFramebufferStatus(fbo_target);
_mesa_BindFramebuffer(fbo_target, fboSave);
if (status != GL_FRAMEBUFFER_COMPLETE_EXT) {
_mesa_perf_debug(ctx, MESA_DEBUG_SEVERITY_HIGH,
"glGenerateMipmap() got incomplete FBO\n");
return true;
}
return false;
}
