/*
* Mesa 3-D graphics library
- * Version: 7.1
*
* Copyright (C) 1999-2007 Brian Paul All Rights Reserved.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
- * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
- * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
*/
#include "main/context.h"
#include "main/macros.h"
#include "main/multisample.h"
+#include "main/mtypes.h"
+#include "main/fbobject.h"
+#include "main/glformats.h"
+#include "main/state.h"
/**
* Called via glSampleCoverageARB
*/
void GLAPIENTRY
-_mesa_SampleCoverageARB(GLclampf value, GLboolean invert)
+_mesa_SampleCoverage(GLclampf value, GLboolean invert)
{
GET_CURRENT_CONTEXT(ctx);
- if (!ctx->Extensions.ARB_multisample) {
- _mesa_error(ctx, GL_INVALID_OPERATION, "glSampleCoverageARB");
- return;
- }
+ value = CLAMP(value, 0.0f, 1.0f);
- ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH( ctx );
+ if (ctx->Multisample.SampleCoverageInvert == invert &&
+ ctx->Multisample.SampleCoverageValue == value)
+ return;
- ctx->Multisample.SampleCoverageValue = (GLfloat) CLAMP(value, 0.0, 1.0);
+ FLUSH_VERTICES(ctx, ctx->DriverFlags.NewSampleMask ? 0 : _NEW_MULTISAMPLE);
+ ctx->NewDriverState |= ctx->DriverFlags.NewSampleMask;
+ ctx->Multisample.SampleCoverageValue = value;
ctx->Multisample.SampleCoverageInvert = invert;
- ctx->NewState |= _NEW_MULTISAMPLE;
}
* \param ctx the GL context.
*/
void
-_mesa_init_multisample(GLcontext *ctx)
+_mesa_init_multisample(struct gl_context *ctx)
{
ctx->Multisample.Enabled = GL_TRUE;
ctx->Multisample.SampleAlphaToCoverage = GL_FALSE;
+ ctx->Multisample.SampleAlphaToCoverageDitherControl = GL_ALPHA_TO_COVERAGE_DITHER_DEFAULT_NV;
ctx->Multisample.SampleAlphaToOne = GL_FALSE;
ctx->Multisample.SampleCoverage = GL_FALSE;
ctx->Multisample.SampleCoverageValue = 1.0;
ctx->Multisample.SampleCoverageInvert = GL_FALSE;
+ ctx->Multisample.SampleShading = GL_FALSE;
+ ctx->Multisample.MinSampleShadingValue = 0.0f;
+
+ /* ARB_texture_multisample / GL3.2 additions */
+ ctx->Multisample.SampleMask = GL_FALSE;
+ ctx->Multisample.SampleMaskValue = ~(GLbitfield)0;
+}
+
+
+void GLAPIENTRY
+_mesa_GetMultisamplefv(GLenum pname, GLuint index, GLfloat * val)
+{
+ GET_CURRENT_CONTEXT(ctx);
+
+ if (ctx->NewState & _NEW_BUFFERS) {
+ _mesa_update_state(ctx);
+ }
+
+ switch (pname) {
+ case GL_SAMPLE_POSITION: {
+ if (index >= ctx->DrawBuffer->Visual.samples) {
+ _mesa_error( ctx, GL_INVALID_VALUE, "glGetMultisamplefv(index)" );
+ return;
+ }
+
+ ctx->Driver.GetSamplePosition(ctx, ctx->DrawBuffer, index, val);
+
+ /* FBOs can be upside down (winsys always are)*/
+ if (ctx->DrawBuffer->FlipY)
+ val[1] = 1.0f - val[1];
+
+ return;
+ }
+
+ case GL_PROGRAMMABLE_SAMPLE_LOCATION_ARB:
+ if (!ctx->Extensions.ARB_sample_locations) {
+ _mesa_error( ctx, GL_INVALID_ENUM, "glGetMultisamplefv(pname)" );
+ return;
+ }
+
+ if (index >= MAX_SAMPLE_LOCATION_TABLE_SIZE * 2) {
+ _mesa_error( ctx, GL_INVALID_VALUE, "glGetMultisamplefv(index)" );
+ return;
+ }
+
+ if (ctx->DrawBuffer->SampleLocationTable)
+ *val = ctx->DrawBuffer->SampleLocationTable[index];
+ else
+ *val = 0.5f;
+
+ return;
+
+ default:
+ _mesa_error( ctx, GL_INVALID_ENUM, "glGetMultisamplefv(pname)" );
+ return;
+ }
+}
+
+static void
+sample_maski(struct gl_context *ctx, GLuint index, GLbitfield mask)
+{
+ if (ctx->Multisample.SampleMaskValue == mask)
+ return;
+
+ FLUSH_VERTICES(ctx, ctx->DriverFlags.NewSampleMask ? 0 : _NEW_MULTISAMPLE);
+ ctx->NewDriverState |= ctx->DriverFlags.NewSampleMask;
+ ctx->Multisample.SampleMaskValue = mask;
+}
+
+void GLAPIENTRY
+_mesa_SampleMaski_no_error(GLuint index, GLbitfield mask)
+{
+ GET_CURRENT_CONTEXT(ctx);
+ sample_maski(ctx, index, mask);
+}
+
+void GLAPIENTRY
+_mesa_SampleMaski(GLuint index, GLbitfield mask)
+{
+ GET_CURRENT_CONTEXT(ctx);
+
+ if (!ctx->Extensions.ARB_texture_multisample) {
+ _mesa_error(ctx, GL_INVALID_OPERATION, "glSampleMaski");
+ return;
+ }
+
+ if (index != 0) {
+ _mesa_error(ctx, GL_INVALID_VALUE, "glSampleMaski(index)");
+ return;
+ }
+
+ sample_maski(ctx, index, mask);
+}
+
+static void
+min_sample_shading(struct gl_context *ctx, GLclampf value)
+{
+ value = CLAMP(value, 0.0f, 1.0f);
+
+ if (ctx->Multisample.MinSampleShadingValue == value)
+ return;
+
+ FLUSH_VERTICES(ctx,
+ ctx->DriverFlags.NewSampleShading ? 0 : _NEW_MULTISAMPLE);
+ ctx->NewDriverState |= ctx->DriverFlags.NewSampleShading;
+ ctx->Multisample.MinSampleShadingValue = value;
+}
+
+/**
+ * Called via glMinSampleShadingARB
+ */
+void GLAPIENTRY
+_mesa_MinSampleShading_no_error(GLclampf value)
+{
+ GET_CURRENT_CONTEXT(ctx);
+ min_sample_shading(ctx, value);
+}
+
+void GLAPIENTRY
+_mesa_MinSampleShading(GLclampf value)
+{
+ GET_CURRENT_CONTEXT(ctx);
+
+ if (!_mesa_has_ARB_sample_shading(ctx) &&
+ !_mesa_has_OES_sample_shading(ctx)) {
+ _mesa_error(ctx, GL_INVALID_OPERATION, "glMinSampleShading");
+ return;
+ }
+
+ min_sample_shading(ctx, value);
+}
+
+/**
+ * Helper for checking a requested sample count against the limit
+ * for a particular (target, internalFormat) pair. The limit imposed,
+ * and the error generated, both depend on which extensions are supported.
+ *
+ * Returns a GL error enum, or GL_NO_ERROR if the requested sample count is
+ * acceptable.
+ */
+GLenum
+_mesa_check_sample_count(struct gl_context *ctx, GLenum target,
+ GLenum internalFormat, GLsizei samples,
+ GLsizei storageSamples)
+{
+ /* Section 4.4 (Framebuffer objects), page 198 of the OpenGL ES 3.0.0
+ * specification says:
+ *
+ * "If internalformat is a signed or unsigned integer format and samples
+ * is greater than zero, then the error INVALID_OPERATION is generated."
+ *
+ * This restriction is relaxed for OpenGL ES 3.1.
+ */
+ if ((ctx->API == API_OPENGLES2 && ctx->Version == 30) &&
+ _mesa_is_enum_format_integer(internalFormat)
+ && samples > 0) {
+ return GL_INVALID_OPERATION;
+ }
+
+ if (ctx->Extensions.AMD_framebuffer_multisample_advanced &&
+ target == GL_RENDERBUFFER) {
+ if (!_mesa_is_depth_or_stencil_format(internalFormat)) {
+ /* From the AMD_framebuffer_multisample_advanced spec:
+ *
+ * "An INVALID_OPERATION error is generated if <internalformat>
+ * is a color format and <storageSamples> is greater than
+ * the implementation-dependent limit MAX_COLOR_FRAMEBUFFER_-
+ * STORAGE_SAMPLES_AMD."
+ */
+ if (samples > ctx->Const.MaxColorFramebufferSamples)
+ return GL_INVALID_OPERATION;
+
+ /* From the AMD_framebuffer_multisample_advanced spec:
+ *
+ * "An INVALID_OPERATION error is generated if <internalformat>
+ * is a color format and <storageSamples> is greater than
+ * the implementation-dependent limit MAX_COLOR_FRAMEBUFFER_-
+ * STORAGE_SAMPLES_AMD."
+ */
+ if (storageSamples > ctx->Const.MaxColorFramebufferStorageSamples)
+ return GL_INVALID_OPERATION;
+
+ /* From the AMD_framebuffer_multisample_advanced spec:
+ *
+ * "An INVALID_OPERATION error is generated if <storageSamples> is
+ * greater than <samples>."
+ */
+ if (storageSamples > samples)
+ return GL_INVALID_OPERATION;
+
+ /* Color renderbuffer sample counts are now fully validated
+ * according to AMD_framebuffer_multisample_advanced.
+ */
+ return GL_NO_ERROR;
+ } else {
+ /* From the AMD_framebuffer_multisample_advanced spec:
+ *
+ * "An INVALID_OPERATION error is generated if <internalformat> is
+ * a depth or stencil format and <storageSamples> is not equal to
+ * <samples>."
+ */
+ if (storageSamples != samples)
+ return GL_INVALID_OPERATION;
+ }
+ } else {
+ /* If the extension is unsupported, it's not possible to set
+ * storageSamples differently.
+ */
+ assert(samples == storageSamples);
+ }
+
+ /* If ARB_internalformat_query is supported, then treat its highest
+ * returned sample count as the absolute maximum for this format; it is
+ * allowed to exceed MAX_SAMPLES.
+ *
+ * From the ARB_internalformat_query spec:
+ *
+ * "If <samples is greater than the maximum number of samples supported
+ * for <internalformat> then the error INVALID_OPERATION is generated."
+ */
+ if (ctx->Extensions.ARB_internalformat_query) {
+ GLint buffer[16] = {-1};
+ GLint limit;
+
+ ctx->Driver.QueryInternalFormat(ctx, target, internalFormat,
+ GL_SAMPLES, buffer);
+ /* since the query returns samples sorted in descending order,
+ * the first element is the greatest supported sample value.
+ */
+ limit = buffer[0];
+
+ return samples > limit ? GL_INVALID_OPERATION : GL_NO_ERROR;
+ }
+
+ /* If ARB_texture_multisample is supported, we have separate limits,
+ * which may be lower than MAX_SAMPLES:
+ *
+ * From the ARB_texture_multisample spec, when describing the operation
+ * of RenderbufferStorageMultisample:
+ *
+ * "If <internalformat> is a signed or unsigned integer format and
+ * <samples> is greater than the value of MAX_INTEGER_SAMPLES, then the
+ * error INVALID_OPERATION is generated"
+ *
+ * And when describing the operation of TexImage*Multisample:
+ *
+ * "The error INVALID_OPERATION may be generated if any of the following
+ * are true:
+ *
+ * * <internalformat> is a depth/stencil-renderable format and <samples>
+ * is greater than the value of MAX_DEPTH_TEXTURE_SAMPLES
+ * * <internalformat> is a color-renderable format and <samples> is
+ * grater than the value of MAX_COLOR_TEXTURE_SAMPLES
+ * * <internalformat> is a signed or unsigned integer format and
+ * <samples> is greater than the value of MAX_INTEGER_SAMPLES
+ */
+
+ if (ctx->Extensions.ARB_texture_multisample) {
+ if (_mesa_is_enum_format_integer(internalFormat))
+ return samples > ctx->Const.MaxIntegerSamples
+ ? GL_INVALID_OPERATION : GL_NO_ERROR;
+
+ if (target == GL_TEXTURE_2D_MULTISAMPLE ||
+ target == GL_TEXTURE_2D_MULTISAMPLE_ARRAY) {
+
+ if (_mesa_is_depth_or_stencil_format(internalFormat))
+ return samples > ctx->Const.MaxDepthTextureSamples
+ ? GL_INVALID_OPERATION : GL_NO_ERROR;
+ else
+ return samples > ctx->Const.MaxColorTextureSamples
+ ? GL_INVALID_OPERATION : GL_NO_ERROR;
+ }
+ }
+
+ /* No more specific limit is available, so just use MAX_SAMPLES:
+ *
+ * On p205 of the GL3.1 spec:
+ *
+ * "... or if samples is greater than MAX_SAMPLES, then the error
+ * INVALID_VALUE is generated"
+ */
+ return (GLuint) samples > ctx->Const.MaxSamples
+ ? GL_INVALID_VALUE : GL_NO_ERROR;
+}
+
+void GLAPIENTRY
+_mesa_AlphaToCoverageDitherControlNV_no_error(GLenum mode)
+{
+ GET_CURRENT_CONTEXT(ctx);
+
+ FLUSH_VERTICES(ctx, ctx->DriverFlags.NewSampleAlphaToXEnable ? 0 :
+ _NEW_MULTISAMPLE);
+ ctx->NewDriverState |= ctx->DriverFlags.NewSampleAlphaToXEnable;
+ ctx->Multisample.SampleAlphaToCoverageDitherControl = mode;
+}
+
+void GLAPIENTRY
+_mesa_AlphaToCoverageDitherControlNV(GLenum mode)
+{
+ GET_CURRENT_CONTEXT(ctx);
+
+ FLUSH_VERTICES(ctx, ctx->DriverFlags.NewSampleAlphaToXEnable ? 0 :
+ _NEW_MULTISAMPLE);
+ ctx->NewDriverState |= ctx->DriverFlags.NewSampleAlphaToXEnable;
+ switch (mode) {
+ case GL_ALPHA_TO_COVERAGE_DITHER_DEFAULT_NV:
+ case GL_ALPHA_TO_COVERAGE_DITHER_ENABLE_NV:
+ case GL_ALPHA_TO_COVERAGE_DITHER_DISABLE_NV:
+ ctx->Multisample.SampleAlphaToCoverageDitherControl = mode;
+ break;
+ default:
+ _mesa_error(ctx, GL_INVALID_ENUM, "glAlphaToCoverageDitherControlNV(invalid parameter)");
+ }
}
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