diff options
| -rw-r--r-- | src/mesa/main/samplerobj.c | 115 |
1 files changed, 115 insertions, 0 deletions
diff --git a/src/mesa/main/samplerobj.c b/src/mesa/main/samplerobj.c index 575724049ab..18a14d89a5d 100644 --- a/src/mesa/main/samplerobj.c +++ b/src/mesa/main/samplerobj.c @@ -51,6 +51,28 @@ _mesa_lookup_samplerobj(struct gl_context *ctx, GLuint name) } +static inline void +begin_samplerobj_lookups(struct gl_context *ctx) +{ + _mesa_HashLockMutex(ctx->Shared->SamplerObjects); +} + + +static inline void +end_samplerobj_lookups(struct gl_context *ctx) +{ + _mesa_HashUnlockMutex(ctx->Shared->SamplerObjects); +} + + +static inline struct gl_sampler_object * +lookup_samplerobj_locked(struct gl_context *ctx, GLuint name) +{ + return (struct gl_sampler_object *) + _mesa_HashLookupLocked(ctx->Shared->SamplerObjects, name); +} + + /** * Handle reference counting. */ @@ -288,6 +310,99 @@ _mesa_BindSampler(GLuint unit, GLuint sampler) void GLAPIENTRY _mesa_BindSamplers(GLuint first, GLsizei count, const GLuint *samplers) { + GET_CURRENT_CONTEXT(ctx); + GLint i; + + /* The ARB_multi_bind spec says: + * + * "An INVALID_OPERATION error is generated if <first> + <count> is + * greater than the number of texture image units supported by + * the implementation." + */ + if (first + count > ctx->Const.MaxCombinedTextureImageUnits) { + _mesa_error(ctx, GL_INVALID_OPERATION, + "glBindSamplers(first=%u + count=%d > the value of " + "GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS=%u)", + first, count, ctx->Const.MaxCombinedTextureImageUnits); + return; + } + + FLUSH_VERTICES(ctx, 0); + + if (samplers) { + /* Note that the error semantics for multi-bind commands differ from + * those of other GL commands. + * + * The Issues section in the ARB_multi_bind spec says: + * + * "(11) Typically, OpenGL specifies that if an error is generated by + * a command, that command has no effect. This is somewhat + * unfortunate for multi-bind commands, because it would require + * a first pass to scan the entire list of bound objects for + * errors and then a second pass to actually perform the + * bindings. Should we have different error semantics? + * + * RESOLVED: Yes. In this specification, when the parameters for + * one of the <count> binding points are invalid, that binding + * point is not updated and an error will be generated. However, + * other binding points in the same command will be updated if + * their parameters are valid and no other error occurs." + */ + + begin_samplerobj_lookups(ctx); + + for (i = 0; i < count; i++) { + const GLuint unit = first + i; + struct gl_sampler_object * const currentSampler = + ctx->Texture.Unit[unit].Sampler; + struct gl_sampler_object *sampObj; + + if (samplers[i] != 0) { + if (currentSampler && currentSampler->Name == samplers[i]) + sampObj = currentSampler; + else + sampObj = lookup_samplerobj_locked(ctx, samplers[i]); + + /* The ARB_multi_bind spec says: + * + * "An INVALID_OPERATION error is generated if any value + * in <samplers> is not zero or the name of an existing + * sampler object (per binding)." + */ + if (!sampObj) { + _mesa_error(ctx, GL_INVALID_OPERATION, + "glBindSamplers(samplers[%d]=%u is not zero or " + "the name of an existing sampler object)", + i, samplers[i]); + continue; + } + } else { + sampObj = NULL; + } + + /* Bind the new sampler */ + if (sampObj != currentSampler) { + _mesa_reference_sampler_object(ctx, + &ctx->Texture.Unit[unit].Sampler, + sampObj); + ctx->NewState |= _NEW_TEXTURE; + } + } + + end_samplerobj_lookups(ctx); + } else { + /* Unbind all samplers in the range <first> through <first>+<count>-1 */ + for (i = 0; i < count; i++) { + const GLuint unit = first + i; + + if (ctx->Texture.Unit[unit].Sampler) { + _mesa_reference_sampler_object(ctx, + &ctx->Texture.Unit[unit].Sampler, + NULL); + ctx->NewState |= _NEW_TEXTURE; + } + } + } } |