From: Henri Verbeet <hverbeet@gmail.com>
Date: Sun, 3 Jul 2011 22:57:42 +0000 (+0200)
Subject: mesa: Allow sampling from units >= MAX_TEXTURE_UNITS in shaders.
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=86adc2b29effb573c18eb0de7016cef605ab1edc;p=mesa.git

mesa: Allow sampling from units >= MAX_TEXTURE_UNITS in shaders.

The total number of units used by a shader is limited to MAX_TEXTURE_UNITS,
but the actual indices are only limited by MAX_COMBINED_TEXTURE_IMAGE_UNITS,
since they're shared between vertex and fragment shaders.

NOTE: This is a candidate for the 7.11 branch.

Signed-off-by: Henri Verbeet <hverbeet@gmail.com>
Reviewed-by: Brian Paul <brianp@vmware.com>
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
---

diff --git a/src/mesa/main/mtypes.h b/src/mesa/main/mtypes.h
index f018c75cc6a..b88118366b2 100644
--- a/src/mesa/main/mtypes.h
+++ b/src/mesa/main/mtypes.h
@@ -1856,7 +1856,7 @@ struct gl_program
    GLbitfield SystemValuesRead;   /**< Bitmask of SYSTEM_VALUE_x inputs used */
    GLbitfield InputFlags[MAX_PROGRAM_INPUTS];   /**< PROG_PARAM_BIT_x flags */
    GLbitfield OutputFlags[MAX_PROGRAM_OUTPUTS]; /**< PROG_PARAM_BIT_x flags */
-   GLbitfield TexturesUsed[MAX_TEXTURE_UNITS];  /**< TEXTURE_x_BIT bitmask */
+   GLbitfield TexturesUsed[MAX_COMBINED_TEXTURE_IMAGE_UNITS];  /**< TEXTURE_x_BIT bitmask */
    GLbitfield SamplersUsed;   /**< Bitfield of which samplers are used */
    GLbitfield ShadowSamplers; /**< Texture units used for shadow sampling. */
 
diff --git a/src/mesa/main/shaderapi.c b/src/mesa/main/shaderapi.c
index b58e30de9c4..cb02e430c78 100644
--- a/src/mesa/main/shaderapi.c
+++ b/src/mesa/main/shaderapi.c
@@ -1032,7 +1032,7 @@ validate_samplers(const struct gl_program *prog, char *errMsg)
       "TEXTURE_2D",
       "TEXTURE_1D",
    };
-   GLint targetUsed[MAX_TEXTURE_IMAGE_UNITS];
+   GLint targetUsed[MAX_COMBINED_TEXTURE_IMAGE_UNITS];
    GLbitfield samplersUsed = prog->SamplersUsed;
    GLuint i;
 
diff --git a/src/mesa/main/uniforms.c b/src/mesa/main/uniforms.c
index 1c4fd82baac..dd069a3a4d1 100644
--- a/src/mesa/main/uniforms.c
+++ b/src/mesa/main/uniforms.c
@@ -580,7 +580,7 @@ _mesa_update_shader_textures_used(struct gl_program *prog)
       if (prog->SamplersUsed & (1 << s)) {
          GLuint unit = prog->SamplerUnits[s];
          GLuint tgt = prog->SamplerTargets[s];
-         assert(unit < MAX_TEXTURE_IMAGE_UNITS);
+         assert(unit < Elements(prog->TexturesUsed));
          assert(tgt < NUM_TEXTURE_TARGETS);
          prog->TexturesUsed[unit] |= (1 << tgt);
       }
@@ -674,7 +674,7 @@ set_program_uniform(struct gl_context *ctx, struct gl_program *program,
          GLuint texUnit = ((GLuint *) values)[i];
 
          /* check that the sampler (tex unit index) is legal */
-         if (texUnit >= ctx->Const.MaxTextureImageUnits) {
+         if (texUnit >= ctx->Const.MaxCombinedTextureImageUnits) {
             _mesa_error(ctx, GL_INVALID_VALUE,
                         "glUniform1(invalid sampler/tex unit index for '%s')",
                         param->Name);