If we call glTexImage2D() with a generic compression format (e.g.
intFormat=GL_COMPRESSED_RGBA) we can't choose a DXT format if we
don't have the external DXT compression library.
We weren't actually enforcing this before since the
pipe_screen::is_format_supported(DXT) query has no dependency on
the DXT compression library.
Now if we're given a generic compressed format and we can't do DXT
compression we'll fall back to a non-compressed format.
Note: This is a candidate for the stable branches.
---
src/mesa/state_tracker/st_cb_drawpixels.c | 6 ++-
src/mesa/state_tracker/st_cb_texture.c | 2 +-
src/mesa/state_tracker/st_format.c | 47 ++++++++++++++++++++++++-----
src/mesa/state_tracker/st_format.h | 2 +-
src/mesa/state_tracker/st_texture.c | 3 +-
5 files changed, 47 insertions(+), 13 deletions(-)
diff --git a/src/mesa/state_tracker/st_cb_drawpixels.c
b/src/mesa/state_tracker/st_cb_drawpixels.c
index c944b81..c3c5326 100644
--- a/src/mesa/state_tracker/st_cb_drawpixels.c
+++ b/src/mesa/state_tracker/st_cb_drawpixels.c
@@ -1499,14 +1499,16 @@ st_CopyPixels(struct gl_context *ctx, GLint srcx, GLint
srcy,
if (type == GL_DEPTH) {
texFormat = st_choose_format(screen, GL_DEPTH_COMPONENT,
GL_NONE, GL_NONE, st->internal_target,
- sample_count, PIPE_BIND_DEPTH_STENCIL);
+ sample_count, PIPE_BIND_DEPTH_STENCIL,
+ FALSE);
assert(texFormat != PIPE_FORMAT_NONE);
}
else {
/* default color format */
texFormat = st_choose_format(screen, GL_RGBA,
GL_NONE, GL_NONE, st->internal_target,
- sample_count, PIPE_BIND_SAMPLER_VIEW);
+ sample_count, PIPE_BIND_SAMPLER_VIEW,
+ FALSE);
assert(texFormat != PIPE_FORMAT_NONE);
}
}
diff --git a/src/mesa/state_tracker/st_cb_texture.c
b/src/mesa/state_tracker/st_cb_texture.c
index 3cea2df..80a440d 100644
--- a/src/mesa/state_tracker/st_cb_texture.c
+++ b/src/mesa/state_tracker/st_cb_texture.c
@@ -597,7 +597,7 @@ decompress_with_blit(struct gl_context * ctx,
/* Find the best match for the format+type combo. */
pipe_format = st_choose_format(pipe->screen, GL_RGBA8, format, type,
- pipe_target, 0, bind);
+ pipe_target, 0, bind, FALSE);
if (pipe_format == PIPE_FORMAT_NONE) {
/* unable to get an rgba format!?! */
_mesa_problem(ctx, "%s: cannot find a supported format", __func__);
diff --git a/src/mesa/state_tracker/st_format.c
b/src/mesa/state_tracker/st_format.c
index 7ef0639..c3b286a 100644
--- a/src/mesa/state_tracker/st_format.c
+++ b/src/mesa/state_tracker/st_format.c
@@ -1397,19 +1397,48 @@ static const struct format_mapping format_map[] = {
/**
+ * Is the given pipe format a DXT format?
+ */
+static boolean
+is_dxt_format(enum pipe_format format)
+{
+ switch (format) {
+ case PIPE_FORMAT_DXT1_RGB:
+ case PIPE_FORMAT_DXT1_RGBA:
+ case PIPE_FORMAT_DXT3_RGBA:
+ case PIPE_FORMAT_DXT5_RGBA:
+ case PIPE_FORMAT_DXT1_SRGB:
+ case PIPE_FORMAT_DXT1_SRGBA:
+ case PIPE_FORMAT_DXT3_SRGBA:
+ case PIPE_FORMAT_DXT5_SRGBA:
+ return TRUE;
+ default:
+ return FALSE;
+ }
+}
+
+
+/**
* Return first supported format from the given list.
+ * \param allow_dxt indicates whether it's OK to return a DXT format.
*/
static enum pipe_format
find_supported_format(struct pipe_screen *screen,
const enum pipe_format formats[],
enum pipe_texture_target target,
unsigned sample_count,
- unsigned tex_usage)
+ unsigned tex_usage,
+ boolean allow_dxt)
{
uint i;
for (i = 0; formats[i]; i++) {
if (screen->is_format_supported(screen, formats[i], target,
sample_count, tex_usage)) {
+ if (!allow_dxt && is_dxt_format(formats[i])) {
+ /* we can't return a dxt format, continue searching */
+ continue;
+ }
+
return formats[i];
}
}
@@ -1519,7 +1548,7 @@ enum pipe_format
st_choose_format(struct pipe_screen *screen, GLenum internalFormat,
GLenum format, GLenum type,
enum pipe_texture_target target, unsigned sample_count,
- unsigned bindings)
+ unsigned bindings, boolean allow_dxt)
{
GET_CURRENT_CONTEXT(ctx); /* XXX this should be a function parameter */
int i, j;
@@ -1547,7 +1576,8 @@ st_choose_format(struct pipe_screen *screen, GLenum
internalFormat,
* which is supported by the driver.
*/
return find_supported_format(screen, mapping->pipeFormats,
- target, sample_count, bindings);
+ target, sample_count, bindings,
+ allow_dxt);
}
}
}
@@ -1569,8 +1599,8 @@ st_choose_renderbuffer_format(struct pipe_screen *screen,
usage = PIPE_BIND_DEPTH_STENCIL;
else
usage = PIPE_BIND_RENDER_TARGET;
- return st_choose_format(screen, internalFormat, GL_NONE, GL_NONE,
PIPE_TEXTURE_2D,
- sample_count, usage);
+ return st_choose_format(screen, internalFormat, GL_NONE, GL_NONE,
+ PIPE_TEXTURE_2D, sample_count, usage, FALSE);
}
@@ -1597,12 +1627,13 @@ st_ChooseTextureFormat_renderable(struct gl_context
*ctx, GLint internalFormat,
}
pFormat = st_choose_format(screen, internalFormat, format, type,
- PIPE_TEXTURE_2D, 0, bindings);
+ PIPE_TEXTURE_2D, 0, bindings, ctx->Mesa_DXTn);
if (pFormat == PIPE_FORMAT_NONE) {
/* try choosing format again, this time without render target bindings */
pFormat = st_choose_format(screen, internalFormat, format, type,
- PIPE_TEXTURE_2D, 0, PIPE_BIND_SAMPLER_VIEW);
+ PIPE_TEXTURE_2D, 0, PIPE_BIND_SAMPLER_VIEW,
+ ctx->Mesa_DXTn);
}
if (pFormat == PIPE_FORMAT_NONE) {
@@ -1661,7 +1692,7 @@ st_QuerySamplesForFormat(struct gl_context *ctx, GLenum
internalFormat,
/* Set sample counts in descending order. */
for (i = 16; i > 1; i--) {
format = st_choose_format(screen, internalFormat, GL_NONE, GL_NONE,
- PIPE_TEXTURE_2D, i, bind);
+ PIPE_TEXTURE_2D, i, bind, FALSE);
if (format != PIPE_FORMAT_NONE) {
samples[num_sample_counts++] = i;
diff --git a/src/mesa/state_tracker/st_format.h
b/src/mesa/state_tracker/st_format.h
index cb6e5bc..eac3cfb 100644
--- a/src/mesa/state_tracker/st_format.h
+++ b/src/mesa/state_tracker/st_format.h
@@ -51,7 +51,7 @@ extern enum pipe_format
st_choose_format(struct pipe_screen *screen, GLenum internalFormat,
GLenum format, GLenum type,
enum pipe_texture_target target, unsigned sample_count,
- unsigned bindings);
+ unsigned bindings, boolean allow_dxt);
extern enum pipe_format
st_choose_renderbuffer_format(struct pipe_screen *screen,
diff --git a/src/mesa/state_tracker/st_texture.c
b/src/mesa/state_tracker/st_texture.c
index ee4d762..584eaa9 100644
--- a/src/mesa/state_tracker/st_texture.c
+++ b/src/mesa/state_tracker/st_texture.c
@@ -398,7 +398,8 @@ st_create_color_map_texture(struct gl_context *ctx)
/* find an RGBA texture format */
format = st_choose_format(pipe->screen, GL_RGBA, GL_NONE, GL_NONE,
- PIPE_TEXTURE_2D, 0, PIPE_BIND_SAMPLER_VIEW);
+ PIPE_TEXTURE_2D, 0, PIPE_BIND_SAMPLER_VIEW,
+ FALSE);
/* create texture for color map/table */
pt = st_texture_create(st, PIPE_TEXTURE_2D, format, 0,
--
1.7.3.4
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