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To:mesa-dev@lists.freedesktop.org From:Brian Paul Subject:[Mesa-dev] [PATCH 12/13] mesa: rework texture completeness testing Date:Sun, 18 Mar 2012 10:49:28 -0600
 

Instead of gl_texture_object::_Complete there are now two fields:
_BaseComplete and _MipmapComplete. The former indicates whether the base
texture level is valid. The later indicates whether the whole mipmap is
valid.

With sampler objects, a single texture can appear to be both complete and
incomplete at the same time. See the GL_ARB_sampler_objects spec for more
details. To implement this we now check if the texture is complete with
respect to a sampler state.

Another benefit of this is we no longer need to invalidate a texture's
completeness state when we change the minification/magnification filters
with glTexParameter().
---
src/mesa/main/mtypes.h | 3 +-
src/mesa/main/texobj.c | 69 ++++++++++++++++++++-----------
src/mesa/main/texobj.h | 13 ++++++
src/mesa/main/texparam.c | 7 +--
src/mesa/main/texstate.c | 7 ++-
src/mesa/state_tracker/st_cb_texture.c | 2 +-
src/mesa/swrast/s_context.c | 5 ++-
src/mesa/swrast/s_texfilter.c | 6 ++-
src/mesa/swrast/s_texfilter.h | 3 +-
9 files changed, 78 insertions(+), 37 deletions(-)

diff --git a/src/mesa/main/mtypes.h b/src/mesa/main/mtypes.h
index f76096a..c6e5b94 100644
--- a/src/mesa/main/mtypes.h
+++ b/src/mesa/main/mtypes.h
@@ -1316,7 +1316,8 @@ struct gl_texture_object
GLenum Swizzle[4]; /**< GL_EXT_texture_swizzle */
GLuint _Swizzle; /**< same as Swizzle, but SWIZZLE_* format */
GLboolean GenerateMipmap; /**< GL_SGIS_generate_mipmap */
- GLboolean _Complete; /**< Is texture object complete? */
+ GLboolean _BaseComplete; /**< Is the base texture level valid? */
+ GLboolean _MipmapComplete; /**< Is the whole mipmap valid? */
GLboolean _RenderToTexture; /**< Any rendering to this texture? */
GLboolean Purgeable; /**< Is the buffer purgeable under memory pressure? */
GLboolean Immutable; /**< GL_ARB_texture_storage */
diff --git a/src/mesa/main/texobj.c b/src/mesa/main/texobj.c
index c07e1ce..5419cd3 100644
--- a/src/mesa/main/texobj.c
+++ b/src/mesa/main/texobj.c
@@ -262,7 +262,8 @@ _mesa_copy_texture_object( struct gl_texture_object *dest,
dest->_MaxLevel = src->_MaxLevel;
dest->_MaxLambda = src->_MaxLambda;
dest->GenerateMipmap = src->GenerateMipmap;
- dest->_Complete = src->_Complete;
+ dest->_BaseComplete = src->_BaseComplete;
+ dest->_MipmapComplete = src->_MipmapComplete;
COPY_4V(dest->Swizzle, src->Swizzle);
dest->_Swizzle = src->_Swizzle;

@@ -386,14 +387,26 @@ _mesa_reference_texobj_(struct gl_texture_object **ptr,
}


+enum base_mipmap { BASE, MIPMAP };
+

/**
- * Mark a texture object as incomplete.
+ * Mark a texture object as incomplete. There are actually three kinds of
+ * (in)completeness:
+ * 1. "base incomplete": the base level of the texture is invalid so no
+ * texturing is possible.
+ * 2. "mipmap incomplete": a non-base level of the texture is invalid so
+ * mipmap filtering isn't possible, but non-mipmap filtering is.
+ * 3. "texture incompleteness": some combination of texture state and
+ * sampler state renders the texture incomplete.
+ *
* \param t texture object
+ * \param bm either BASE or MIPMAP to indicate what's incomplete
* \param fmt... string describing why it's incomplete (for debugging).
*/
static void
-incomplete(struct gl_texture_object *t, const char *fmt, ...)
+incomplete(struct gl_texture_object *t, enum base_mipmap bm,
+ const char *fmt, ...)
{
#if 0
va_list args;
@@ -405,7 +418,9 @@ incomplete(struct gl_texture_object *t, const char *fmt, ...)

printf("Texture Obj %d incomplete because: %s\n", t->Name, s);
#endif
- t->_Complete = GL_FALSE;
+ if (bm == BASE)
+ t->_BaseComplete = GL_FALSE;
+ t->_MipmapComplete = GL_FALSE;
}


@@ -429,18 +444,20 @@ _mesa_test_texobj_completeness( const struct gl_context *ctx,
const struct gl_texture_image *baseImage;
GLint maxLog2 = 0, maxLevels = 0;

- t->_Complete = GL_TRUE; /* be optimistic */
+ /* We'll set these to FALSE if tests fail below */
+ t->_BaseComplete = GL_TRUE;
+ t->_MipmapComplete = GL_TRUE;

/* Detect cases where the application set the base level to an invalid
* value.
*/
if ((baseLevel < 0) || (baseLevel >= MAX_TEXTURE_LEVELS)) {
- incomplete(t, "base level = %d is invalid", baseLevel);
+ incomplete(t, BASE, "base level = %d is invalid", baseLevel);
return;
}

if (t->MaxLevel < baseLevel) {
- incomplete(t, "MAX_LEVEL (%d) < BASE_LEVEL (%d)",
+ incomplete(t, BASE, "MAX_LEVEL (%d) < BASE_LEVEL (%d)",
t->MaxLevel, baseLevel);
return;
}
@@ -449,7 +466,7 @@ _mesa_test_texobj_completeness( const struct gl_context *ctx,

/* Always need the base level image */
if (!baseImage) {
- incomplete(t, "Image[baseLevel=%d] == NULL", baseLevel);
+ incomplete(t, BASE, "Image[baseLevel=%d] == NULL", baseLevel);
return;
}

@@ -457,7 +474,7 @@ _mesa_test_texobj_completeness( const struct gl_context *ctx,
if (baseImage->Width == 0 ||
baseImage->Height == 0 ||
baseImage->Depth == 0) {
- incomplete(t, "texture width or height or depth = 0");
+ incomplete(t, BASE, "texture width or height or depth = 0");
return;
}

@@ -525,26 +542,26 @@ _mesa_test_texobj_completeness( const struct gl_context *ctx,
if (t->Image[face][baseLevel] == NULL ||
t->Image[face][baseLevel]->Width2 != w ||
t->Image[face][baseLevel]->Height2 != h) {
- incomplete(t, "Cube face missing or mismatched size");
+ incomplete(t, BASE, "Cube face missing or mismatched size");
return;
}
}
}

/*
- * Do mipmap consistency checking
+ * Do mipmap consistency checking.
+ * Note: we don't care about the current texture sampler state here.
+ * To determine texture completeness we'll either look at _BaseComplete
+ * or _MipmapComplete depending on the current minification filter mode.
*/
- if (t->Sampler.MinFilter != GL_NEAREST && t->Sampler.MinFilter != GL_LINEAR) {
- /*
- * Mipmapping: determine if we have a complete set of mipmaps
- */
+ {
GLint i;
const GLint minLevel = baseLevel;
const GLint maxLevel = t->_MaxLevel;
GLuint width, height, depth, face, numFaces = 1;

if (minLevel > maxLevel) {
- incomplete(t, "minLevel > maxLevel");
+ incomplete(t, 0, "minLevel > maxLevel");
return;
}

@@ -572,27 +589,27 @@ _mesa_test_texobj_completeness( const struct gl_context *ctx,
const struct gl_texture_image *img = t->Image[face][i];

if (!img) {
- incomplete(t, "TexImage[%d] is missing", i);
+ incomplete(t, MIPMAP, "TexImage[%d] is missing", i);
return;
}
if (img->TexFormat != baseImage->TexFormat) {
- incomplete(t, "Format[i] != Format[baseLevel]");
+ incomplete(t, MIPMAP, "Format[i] != Format[baseLevel]");
return;
}
if (img->Border != baseImage->Border) {
- incomplete(t, "Border[i] != Border[baseLevel]");
+ incomplete(t, MIPMAP, "Border[i] != Border[baseLevel]");
return;
}
if (img->Width2 != width) {
- incomplete(t, "TexImage[%d] bad width %u", i, img->Width2);
+ incomplete(t, MIPMAP, "TexImage[%d] bad width %u", i, img->Width2);
return;
}
if (img->Height2 != height) {
- incomplete(t, "TexImage[%d] bad height %u", i, img->Height2);
+ incomplete(t, MIPMAP, "TexImage[%d] bad height %u", i, img->Height2);
return;
}
if (img->Depth2 != depth) {
- incomplete(t, "TexImage[%d] bad depth %u", i, img->Depth2);
+ incomplete(t, MIPMAP, "TexImage[%d] bad depth %u", i, img->Depth2);
return;
}

@@ -601,7 +618,7 @@ _mesa_test_texobj_completeness( const struct gl_context *ctx,
/* check that cube faces are the same size */
if (img->Width2 != t->Image[0][i]->Width2 ||
img->Height2 != t->Image[0][i]->Height2) {
- incomplete(t, "CubeMap Image[n][i] bad size");
+ incomplete(t, MIPMAP, "CubeMap Image[n][i] bad size");
return;
}
}
@@ -666,7 +683,8 @@ void
_mesa_dirty_texobj(struct gl_context *ctx, struct gl_texture_object *texObj,
GLboolean invalidate_state)
{
- texObj->_Complete = GL_FALSE;
+ texObj->_BaseComplete = GL_FALSE;
+ texObj->_MipmapComplete = GL_FALSE;
if (invalidate_state)
ctx->NewState |= _NEW_TEXTURE;
}
@@ -789,7 +807,8 @@ _mesa_get_fallback_texture(struct gl_context *ctx, gl_texture_index tex)
}

_mesa_test_texobj_completeness(ctx, texObj);
- assert(texObj->_Complete);
+ assert(texObj->_BaseComplete);
+ assert(texObj->_MipmapComplete);

ctx->Shared->FallbackTex[tex] = texObj;
}
diff --git a/src/mesa/main/texobj.h b/src/mesa/main/texobj.h
index 03dfbe3..850091e 100644
--- a/src/mesa/main/texobj.h
+++ b/src/mesa/main/texobj.h
@@ -35,6 +35,7 @@
#include "compiler.h"
#include "glheader.h"
#include "mtypes.h"
+#include "samplerobj.h"


/**
@@ -77,6 +78,18 @@ _mesa_reference_texobj(struct gl_texture_object **ptr,
}


+/** Is the texture "complete" with respect to the given sampler state? */
+static inline GLboolean
+_mesa_is_texture_complete(const struct gl_texture_object *texObj,
+ const struct gl_sampler_object *sampler)
+{
+ if (_mesa_is_mipmap_filter(sampler))
+ return texObj->_MipmapComplete;
+ else
+ return texObj->_BaseComplete;
+}
+
+
extern void
_mesa_test_texobj_completeness( const struct gl_context *ctx,
struct gl_texture_object *obj );
diff --git a/src/mesa/main/texparam.c b/src/mesa/main/texparam.c
index 205f51f..9abc503 100644
--- a/src/mesa/main/texparam.c
+++ b/src/mesa/main/texparam.c
@@ -212,8 +212,7 @@ flush(struct gl_context *ctx)

/**
* This is called just prior to changing any texture object state which
- * can effect texture completeness (texture base level, max level,
- * minification filter).
+ * can effect texture completeness (texture base level, max level).
* Any pending rendering will be flushed out, we'll set the _NEW_TEXTURE
* state flag and then mark the texture object as 'incomplete' so that any
* per-texture derived state gets recomputed.
@@ -242,7 +241,7 @@ set_tex_parameteri(struct gl_context *ctx,
switch (params[0]) {
case GL_NEAREST:
case GL_LINEAR:
- incomplete(ctx, texObj);
+ flush(ctx);
texObj->Sampler.MinFilter = params[0];
return GL_TRUE;
case GL_NEAREST_MIPMAP_NEAREST:
@@ -251,7 +250,7 @@ set_tex_parameteri(struct gl_context *ctx,
case GL_LINEAR_MIPMAP_LINEAR:
if (texObj->Target != GL_TEXTURE_RECTANGLE_NV &&
texObj->Target != GL_TEXTURE_EXTERNAL_OES) {
- incomplete(ctx, texObj);
+ flush(ctx);
texObj->Sampler.MinFilter = params[0];
return GL_TRUE;
}
diff --git a/src/mesa/main/texstate.c b/src/mesa/main/texstate.c
index 187ec9c..ee778ff 100644
--- a/src/mesa/main/texstate.c
+++ b/src/mesa/main/texstate.c
@@ -569,10 +569,13 @@ update_texture_state( struct gl_context *ctx )
for (texIndex = 0; texIndex < NUM_TEXTURE_TARGETS; texIndex++) {
if (enabledTargets & (1 << texIndex)) {
struct gl_texture_object *texObj = texUnit->CurrentTex[texIndex];
- if (!texObj->_Complete) {
+ struct gl_sampler_object *sampler = texUnit->Sampler ?
+ texUnit->Sampler : &texObj->Sampler;
+
+ if (!_mesa_is_texture_complete(texObj, sampler)) {
_mesa_test_texobj_completeness(ctx, texObj);
}
- if (texObj->_Complete) {
+ if (_mesa_is_texture_complete(texObj, sampler)) {
texUnit->_ReallyEnabled = 1 << texIndex;
_mesa_reference_texobj(&texUnit->_Current, texObj);
break;
diff --git a/src/mesa/state_tracker/st_cb_texture.c b/src/mesa/state_tracker/st_cb_texture.c
index ea59ccf..f9c190a 100644
--- a/src/mesa/state_tracker/st_cb_texture.c
+++ b/src/mesa/state_tracker/st_cb_texture.c
@@ -1243,7 +1243,7 @@ st_finalize_texture(struct gl_context *ctx,
enum pipe_format firstImageFormat;
GLuint ptWidth, ptHeight, ptDepth, ptLayers;

- if (stObj->base._Complete) {
+ if (_mesa_is_texture_complete(tObj, &tObj->Sampler)) {
/* The texture is complete and we know exactly how many mipmap levels
* are present/needed. This is conditional because we may be called
* from the st_generate_mipmap() function when the texture object is
diff --git a/src/mesa/swrast/s_context.c b/src/mesa/swrast/s_context.c
index beb9158..432db71 100644
--- a/src/mesa/swrast/s_context.c
+++ b/src/mesa/swrast/s_context.c
@@ -30,6 +30,7 @@
#include "main/bufferobj.h"
#include "main/colormac.h"
#include "main/mtypes.h"
+#include "main/samplerobj.h"
#include "main/teximage.h"
#include "program/prog_parameter.h"
#include "program/prog_statevars.h"
@@ -482,7 +483,9 @@ _swrast_update_texture_samplers(struct gl_context *ctx)
if (tObj) {
_mesa_update_fetch_functions(tObj);
}
- swrast->TextureSample[u] = _swrast_choose_texture_sample_func(ctx, tObj);
+ swrast->TextureSample[u] =
+ _swrast_choose_texture_sample_func(ctx, tObj,
+ _mesa_get_samplerobj(ctx, u));
}
}

diff --git a/src/mesa/swrast/s_texfilter.c b/src/mesa/swrast/s_texfilter.c
index d142d3d..412316f 100644
--- a/src/mesa/swrast/s_texfilter.c
+++ b/src/mesa/swrast/s_texfilter.c
@@ -27,6 +27,7 @@
#include "main/context.h"
#include "main/colormac.h"
#include "main/imports.h"
+#include "main/texobj.h"

#include "s_context.h"
#include "s_texfilter.h"
@@ -3612,9 +3613,10 @@ null_sample_func( struct gl_context *ctx,
*/
texture_sample_func
_swrast_choose_texture_sample_func( struct gl_context *ctx,
- const struct gl_texture_object *t )
+ const struct gl_texture_object *t,
+ const struct gl_sampler_object *sampler)
{
- if (!t || !t->_Complete) {
+ if (!t || !_mesa_is_texture_complete(t, sampler)) {
return &null_sample_func;
}
else {
diff --git a/src/mesa/swrast/s_texfilter.h b/src/mesa/swrast/s_texfilter.h
index 69f2d80..58b5736 100644
--- a/src/mesa/swrast/s_texfilter.h
+++ b/src/mesa/swrast/s_texfilter.h
@@ -35,7 +35,8 @@ struct gl_texture_object;

extern texture_sample_func
_swrast_choose_texture_sample_func( struct gl_context *ctx,
- const struct gl_texture_object *tObj );
+ const struct gl_texture_object *tObj,
+ const struct gl_sampler_object *sampler);


#endif
--
1.7.3.4

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