#include "context.h"
#include "enums.h"
#include "macros.h"
+#include "shaderimage.h"
#include "texobj.h"
#include "teximage.h"
#include "texstate.h"
#include "mtypes.h"
-
+#include "bitset.h"
/**
for (tex = 0; tex < NUM_TEXTURE_TARGETS; tex++) {
_mesa_reference_texobj(&dst->Texture.Unit[u].CurrentTex[tex],
src->Texture.Unit[u].CurrentTex[tex]);
+ if (src->Texture.Unit[u].CurrentTex[tex]) {
+ dst->Texture.NumCurrentTexUsed =
+ MAX2(dst->Texture.NumCurrentTexUsed, u + 1);
+ }
}
+ dst->Texture.Unit[u]._BoundTextures = src->Texture.Unit[u]._BoundTextures;
_mesa_unlock_context_textures(dst);
}
}
if (_math_matrix_is_dirty(ctx->TextureMatrixStack[u].Top)) {
_math_matrix_analyse( ctx->TextureMatrixStack[u].Top );
- if (ctx->Texture.Unit[u]._ReallyEnabled &&
+ if (ctx->Texture.Unit[u]._Current &&
ctx->TextureMatrixStack[u].Top->type != MATRIX_IDENTITY)
ctx->Texture._TexMatEnabled |= ENABLE_TEXMAT(u);
}
}
}
-/**
- * \note This routine refers to derived texture matrix values to
- * compute the ENABLE_TEXMAT flags, but is only called on
- * _NEW_TEXTURE. On changes to _NEW_TEXTURE_MATRIX, the ENABLE_TEXMAT
- * flags are updated by _mesa_update_texture_matrices, above.
- *
- * \param ctx GL context.
- */
-static void
-update_texture_state( struct gl_context *ctx )
+static struct gl_texture_object *
+update_single_program_texture(struct gl_context *ctx, struct gl_program *prog,
+ int s)
{
- GLuint unit;
- struct gl_program *fprog = NULL;
- struct gl_program *vprog = NULL;
- struct gl_program *gprog = NULL;
- GLbitfield enabledFragUnits = 0x0;
-
- if (ctx->Shader.CurrentVertexProgram &&
- ctx->Shader.CurrentVertexProgram->LinkStatus) {
- vprog = ctx->Shader.CurrentVertexProgram->_LinkedShaders[MESA_SHADER_VERTEX]->Program;
- }
+ gl_texture_index target_index;
+ struct gl_texture_unit *texUnit;
+ struct gl_texture_object *texObj;
+ struct gl_sampler_object *sampler;
+ int unit;
- if (ctx->Shader.CurrentGeometryProgram &&
- ctx->Shader.CurrentGeometryProgram->LinkStatus) {
- gprog = ctx->Shader.CurrentGeometryProgram->_LinkedShaders[MESA_SHADER_GEOMETRY]->Program;
- }
+ if (!(prog->SamplersUsed & (1 << s)))
+ return NULL;
- if (ctx->Shader.CurrentFragmentProgram &&
- ctx->Shader.CurrentFragmentProgram->LinkStatus) {
- fprog = ctx->Shader.CurrentFragmentProgram->_LinkedShaders[MESA_SHADER_FRAGMENT]->Program;
- }
- else if (ctx->FragmentProgram._Enabled) {
- fprog = &ctx->FragmentProgram.Current->Base;
- }
+ unit = prog->SamplerUnits[s];
+ texUnit = &ctx->Texture.Unit[unit];
- /* TODO: only set this if there are actual changes */
- ctx->NewState |= _NEW_TEXTURE;
+ /* Note: If more than one bit was set in TexturesUsed[unit], then we should
+ * have had the draw call rejected already. From the GL 4.4 specification,
+ * section 7.10 ("Samplers"):
+ *
+ * "It is not allowed to have variables of different sampler types
+ * pointing to the same texture image unit within a program
+ * object. This situation can only be detected at the next rendering
+ * command issued which triggers shader invocations, and an
+ * INVALID_OPERATION error will then be generated."
+ */
+ target_index = ffs(prog->TexturesUsed[unit]) - 1;
+ texObj = texUnit->CurrentTex[target_index];
- ctx->Texture._EnabledUnits = 0x0;
- ctx->Texture._GenFlags = 0x0;
- ctx->Texture._TexMatEnabled = 0x0;
- ctx->Texture._TexGenEnabled = 0x0;
+ sampler = texUnit->Sampler ?
+ texUnit->Sampler : &texObj->Sampler;
- /*
- * Update texture unit state.
+ if (likely(texObj)) {
+ if (_mesa_is_texture_complete(texObj, sampler))
+ return texObj;
+
+ _mesa_test_texobj_completeness(ctx, texObj);
+ if (_mesa_is_texture_complete(texObj, sampler))
+ return texObj;
+ }
+
+ /* If we've reached this point, we didn't find a complete texture of the
+ * shader's target. From the GL 4.4 core specification, section 11.1.3.5
+ * ("Texture Access"):
+ *
+ * "If a sampler is used in a shader and the sampler’s associated
+ * texture is not complete, as defined in section 8.17, (0, 0, 0, 1)
+ * will be returned for a non-shadow sampler and 0 for a shadow
+ * sampler."
+ *
+ * Mesa implements this by creating a hidden texture object with a pixel of
+ * that value.
*/
- for (unit = 0; unit < ctx->Const.MaxCombinedTextureImageUnits; unit++) {
- struct gl_texture_unit *texUnit = &ctx->Texture.Unit[unit];
- GLbitfield enabledVertTargets = 0x0;
- GLbitfield enabledFragTargets = 0x0;
- GLbitfield enabledGeomTargets = 0x0;
- GLbitfield enabledTargets = 0x0;
- GLuint texIndex;
+ texObj = _mesa_get_fallback_texture(ctx, target_index);
+ assert(texObj);
+
+ return texObj;
+}
+
+static void
+update_program_texture_state(struct gl_context *ctx, struct gl_program **prog,
+ BITSET_WORD *enabled_texture_units)
+{
+ int i;
- /* Get the bitmask of texture target enables.
- * enableBits will be a mask of the TEXTURE_*_BIT flags indicating
- * which texture targets are enabled (fixed function) or referenced
- * by a fragment program/program. When multiple flags are set, we'll
- * settle on the one with highest priority (see below).
+ for (i = 0; i < MESA_SHADER_STAGES; i++) {
+ int s;
+
+ if (!prog[i])
+ continue;
+
+ /* We can't only do the shifting trick as the loop condition because if
+ * sampler 31 is active, the next iteration tries to shift by 32, which is
+ * undefined.
*/
- if (vprog) {
- enabledVertTargets |= vprog->TexturesUsed[unit];
+ for (s = 0; s < MAX_SAMPLERS && (1 << s) <= prog[i]->SamplersUsed; s++) {
+ struct gl_texture_object *texObj;
+
+ texObj = update_single_program_texture(ctx, prog[i], s);
+ if (texObj) {
+ int unit = prog[i]->SamplerUnits[s];
+ _mesa_reference_texobj(&ctx->Texture.Unit[unit]._Current, texObj);
+ BITSET_SET(enabled_texture_units, unit);
+ ctx->Texture._MaxEnabledTexImageUnit =
+ MAX2(ctx->Texture._MaxEnabledTexImageUnit, (int)unit);
+ }
}
+ }
- if (gprog) {
- enabledGeomTargets |= gprog->TexturesUsed[unit];
- }
+ if (prog[MESA_SHADER_FRAGMENT]) {
+ const GLuint coordMask = (1 << MAX_TEXTURE_COORD_UNITS) - 1;
+ ctx->Texture._EnabledCoordUnits |=
+ (prog[MESA_SHADER_FRAGMENT]->InputsRead >> VARYING_SLOT_TEX0) &
+ coordMask;
+ }
+}
- if (fprog) {
- enabledFragTargets |= fprog->TexturesUsed[unit];
- }
- else {
- /* fixed-function fragment program */
- enabledFragTargets |= texUnit->Enabled;
- }
+static void
+update_ff_texture_state(struct gl_context *ctx,
+ BITSET_WORD *enabled_texture_units)
+{
+ int unit;
- enabledTargets = enabledVertTargets | enabledFragTargets |
- enabledGeomTargets;
+ for (unit = 0; unit < ctx->Const.MaxTextureUnits; unit++) {
+ struct gl_texture_unit *texUnit = &ctx->Texture.Unit[unit];
+ GLuint texIndex;
- texUnit->_ReallyEnabled = 0x0;
+ if (texUnit->Enabled == 0x0)
+ continue;
- if (enabledTargets == 0x0) {
- /* neither vertex nor fragment processing uses this unit */
+ /* If a shader already dictated what texture target was used for this
+ * unit, just go along with it.
+ */
+ if (BITSET_TEST(enabled_texture_units, unit))
continue;
- }
- /* Look for the highest priority texture target that's enabled (or used
- * by the vert/frag shaders) and "complete". That's the one we'll use
- * for texturing.
+ /* From the GL 4.4 compat specification, section 16.2 ("Texture Application"):
+ *
+ * "Texturing is enabled or disabled using the generic Enable and
+ * Disable commands, respectively, with the symbolic constants
+ * TEXTURE_1D, TEXTURE_2D, TEXTURE_RECTANGLE, TEXTURE_3D, or
+ * TEXTURE_CUBE_MAP to enable the one-, two-, rectangular,
+ * three-dimensional, or cube map texture, respectively. If more
+ * than one of these textures is enabled, the first one enabled
+ * from the following list is used:
+ *
+ * • cube map texture
+ * • three-dimensional texture
+ * • rectangular texture
+ * • two-dimensional texture
+ * • one-dimensional texture"
*
* Note that the TEXTURE_x_INDEX values are in high to low priority.
+ * Also:
+ *
+ * "If a texture unit is disabled or has an invalid or incomplete
+ * texture (as defined in section 8.17) bound to it, then blending
+ * is disabled for that texture unit. If the texture environment
+ * for a given enabled texture unit references a disabled texture
+ * unit, or an invalid or incomplete texture that is bound to
+ * another unit, then the results of texture blending are
+ * undefined."
*/
for (texIndex = 0; texIndex < NUM_TEXTURE_TARGETS; texIndex++) {
- if (enabledTargets & (1 << texIndex)) {
+ if (texUnit->Enabled & (1 << texIndex)) {
struct gl_texture_object *texObj = texUnit->CurrentTex[texIndex];
struct gl_sampler_object *sampler = texUnit->Sampler ?
texUnit->Sampler : &texObj->Sampler;
_mesa_test_texobj_completeness(ctx, texObj);
}
if (_mesa_is_texture_complete(texObj, sampler)) {
- texUnit->_ReallyEnabled = 1 << texIndex;
_mesa_reference_texobj(&texUnit->_Current, texObj);
break;
}
}
}
- if (!texUnit->_ReallyEnabled) {
- if (fprog) {
- /* If we get here it means the shader is expecting a texture
- * object, but there isn't one (or it's incomplete). Use the
- * fallback texture.
- */
- struct gl_texture_object *texObj;
- gl_texture_index texTarget;
-
- texTarget = (gl_texture_index) (ffs(enabledTargets) - 1);
- texObj = _mesa_get_fallback_texture(ctx, texTarget);
-
- assert(texObj);
- if (!texObj) {
- /* invalid fallback texture: don't enable the texture unit */
- continue;
- }
-
- _mesa_reference_texobj(&texUnit->_Current, texObj);
- texUnit->_ReallyEnabled = 1 << texTarget;
- }
- else {
- /* fixed-function: texture unit is really disabled */
- continue;
- }
- }
+ if (texIndex == NUM_TEXTURE_TARGETS)
+ continue;
/* if we get here, we know this texture unit is enabled */
+ BITSET_SET(enabled_texture_units, unit);
+ ctx->Texture._MaxEnabledTexImageUnit =
+ MAX2(ctx->Texture._MaxEnabledTexImageUnit, (int)unit);
- ctx->Texture._EnabledUnits |= (1 << unit);
+ ctx->Texture._EnabledCoordUnits |= 1 << unit;
- if (enabledFragTargets)
- enabledFragUnits |= (1 << unit);
+ update_tex_combine(ctx, texUnit);
+ }
+}
- if (!fprog)
- update_tex_combine(ctx, texUnit);
+/**
+ * \note This routine refers to derived texture matrix values to
+ * compute the ENABLE_TEXMAT flags, but is only called on
+ * _NEW_TEXTURE. On changes to _NEW_TEXTURE_MATRIX, the ENABLE_TEXMAT
+ * flags are updated by _mesa_update_texture_matrices, above.
+ *
+ * \param ctx GL context.
+ */
+static void
+update_texture_state( struct gl_context *ctx )
+{
+ struct gl_program *prog[MESA_SHADER_STAGES];
+ int i;
+ int old_max_unit = ctx->Texture._MaxEnabledTexImageUnit;
+ BITSET_DECLARE(enabled_texture_units, MAX_COMBINED_TEXTURE_IMAGE_UNITS);
+
+ for (i = 0; i < MESA_SHADER_STAGES; i++) {
+ if (ctx->_Shader->CurrentProgram[i] &&
+ ctx->_Shader->CurrentProgram[i]->LinkStatus) {
+ prog[i] = ctx->_Shader->CurrentProgram[i]->_LinkedShaders[i]->Program;
+ } else {
+ if (i == MESA_SHADER_FRAGMENT && ctx->FragmentProgram._Enabled)
+ prog[i] = &ctx->FragmentProgram.Current->Base;
+ else
+ prog[i] = NULL;
+ }
}
+ /* TODO: only set this if there are actual changes */
+ ctx->NewState |= _NEW_TEXTURE;
- /* Determine which texture coordinate sets are actually needed */
- if (fprog) {
- const GLuint coordMask = (1 << MAX_TEXTURE_COORD_UNITS) - 1;
- ctx->Texture._EnabledCoordUnits
- = (fprog->InputsRead >> VARYING_SLOT_TEX0) & coordMask;
+ ctx->Texture._GenFlags = 0x0;
+ ctx->Texture._TexMatEnabled = 0x0;
+ ctx->Texture._TexGenEnabled = 0x0;
+ ctx->Texture._MaxEnabledTexImageUnit = -1;
+ ctx->Texture._EnabledCoordUnits = 0x0;
+
+ memset(&enabled_texture_units, 0, sizeof(enabled_texture_units));
+
+ /* First, walk over our programs pulling in all the textures for them.
+ * Programs dictate specific texture targets to be enabled, and for a draw
+ * call to be valid they can't conflict about which texture targets are
+ * used.
+ */
+ update_program_texture_state(ctx, prog, enabled_texture_units);
+
+ /* Also pull in any textures necessary for fixed function fragment shading.
+ */
+ if (!prog[MESA_SHADER_FRAGMENT])
+ update_ff_texture_state(ctx, enabled_texture_units);
+
+ /* Now, clear out the _Current of any disabled texture units. */
+ for (i = 0; i <= ctx->Texture._MaxEnabledTexImageUnit; i++) {
+ if (!BITSET_TEST(enabled_texture_units, i))
+ _mesa_reference_texobj(&ctx->Texture.Unit[i]._Current, NULL);
}
- else {
- ctx->Texture._EnabledCoordUnits = enabledFragUnits;
+ for (i = ctx->Texture._MaxEnabledTexImageUnit + 1; i <= old_max_unit; i++) {
+ _mesa_reference_texobj(&ctx->Texture.Unit[i]._Current, NULL);
}
- if (!fprog || !vprog)
+ if (!prog[MESA_SHADER_FRAGMENT] || !prog[MESA_SHADER_VERTEX])
update_texgen(ctx);
+
+ _mesa_validate_image_units(ctx);
}
_mesa_reference_texobj(&texUnit->CurrentTex[tex],
ctx->Shared->DefaultTex[tex]);
}
+
+ texUnit->_BoundTextures = 0;
}
/* Texture group */
ctx->Texture.CurrentUnit = 0; /* multitexture */
- ctx->Texture._EnabledUnits = 0x0;
/* Appendix F.2 of the OpenGL ES 3.0 spec says:
*
_mesa_reference_buffer_object(ctx, &ctx->Texture.BufferObject,
ctx->Shared->NullBufferObj);
+ ctx->Texture.NumCurrentTexUsed = 0;
+
return GL_TRUE;
}
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