/*
* Mesa 3-D graphics library
- * Version: 6.5.1
*
* Copyright (C) 1999-2006 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.
*/
switch (factor) {
case GL_SRC_COLOR:
case GL_ONE_MINUS_SRC_COLOR:
- return ctx->Extensions.NV_blend_square;
case GL_ZERO:
case GL_ONE:
case GL_DST_COLOR:
switch (factor) {
case GL_DST_COLOR:
case GL_ONE_MINUS_DST_COLOR:
- return ctx->Extensions.NV_blend_square;
case GL_ZERO:
case GL_ONE:
case GL_SRC_COLOR:
switch (target) {
case GL_CLAMP_VERTEX_COLOR_ARB:
+ if (ctx->API == API_OPENGL_CORE &&
+ !ctx->Extensions.ARB_color_buffer_float) {
+ goto invalid_enum;
+ }
FLUSH_VERTICES(ctx, _NEW_LIGHT);
ctx->Light.ClampVertexColor = clamp;
+ _mesa_update_clamp_vertex_color(ctx);
break;
case GL_CLAMP_FRAGMENT_COLOR_ARB:
+ if (ctx->API == API_OPENGL_CORE &&
+ !ctx->Extensions.ARB_color_buffer_float) {
+ goto invalid_enum;
+ }
FLUSH_VERTICES(ctx, _NEW_FRAG_CLAMP);
ctx->Color.ClampFragmentColor = clamp;
+ _mesa_update_clamp_fragment_color(ctx);
break;
case GL_CLAMP_READ_COLOR_ARB:
- FLUSH_VERTICES(ctx, _NEW_COLOR);
ctx->Color.ClampReadColor = clamp;
break;
default:
- _mesa_error(ctx, GL_INVALID_ENUM, "glClampColorARB(target)");
- return;
+ goto invalid_enum;
}
+ return;
+
+invalid_enum:
+ _mesa_error(ctx, GL_INVALID_ENUM, "glClampColor(%s)",
+ _mesa_lookup_enum_by_nr(target));
+}
+
+static GLboolean
+get_clamp_color(const struct gl_framebuffer *fb, GLenum clamp)
+{
+ if (clamp == GL_TRUE || clamp == GL_FALSE)
+ return clamp;
+
+ ASSERT(clamp == GL_FIXED_ONLY);
+ if (!fb)
+ return GL_TRUE;
+
+ return fb->_AllColorBuffersFixedPoint;
+}
+
+GLboolean
+_mesa_get_clamp_fragment_color(const struct gl_context *ctx)
+{
+ return get_clamp_color(ctx->DrawBuffer,
+ ctx->Color.ClampFragmentColor);
+}
+
+GLboolean
+_mesa_get_clamp_vertex_color(const struct gl_context *ctx)
+{
+ return get_clamp_color(ctx->DrawBuffer, ctx->Light.ClampVertexColor);
}
+GLboolean
+_mesa_get_clamp_read_color(const struct gl_context *ctx)
+{
+ return get_clamp_color(ctx->ReadBuffer, ctx->Color.ClampReadColor);
+}
+
+/**
+ * Update the ctx->Color._ClampFragmentColor field
+ */
+void
+_mesa_update_clamp_fragment_color(struct gl_context *ctx)
+{
+ struct gl_framebuffer *fb = ctx->DrawBuffer;
+
+ /* Don't clamp if:
+ * - there is no colorbuffer
+ * - all colorbuffers are unsigned normalized, so clamping has no effect
+ * - there is an integer colorbuffer
+ */
+ if (!fb || !fb->_HasSNormOrFloatColorBuffer || fb->_IntegerColor)
+ ctx->Color._ClampFragmentColor = GL_FALSE;
+ else
+ ctx->Color._ClampFragmentColor = _mesa_get_clamp_fragment_color(ctx);
+}
+/**
+ * Update the ctx->Color._ClampVertexColor field
+ */
+void
+_mesa_update_clamp_vertex_color(struct gl_context *ctx)
+{
+ ctx->Light._ClampVertexColor = _mesa_get_clamp_vertex_color(ctx);
+}
+/**
+ * Returns an appropriate mesa_format for color rendering based on the
+ * GL_FRAMEBUFFER_SRGB state.
+ *
+ * Some drivers implement GL_FRAMEBUFFER_SRGB using a flag on the blend state
+ * (which GL_FRAMEBUFFER_SRGB maps to reasonably), but some have to do so by
+ * overriding the format of the surface. This is a helper for doing the
+ * surface format override variant.
+ */
+mesa_format
+_mesa_get_render_format(const struct gl_context *ctx, mesa_format format)
+{
+ if (ctx->Color.sRGBEnabled)
+ return format;
+ else
+ return _mesa_get_srgb_format_linear(format);
+}
/**********************************************************************/
/** \name Initialization */
ctx->Color.LogicOp = GL_COPY;
ctx->Color.DitherFlag = GL_TRUE;
- if (ctx->Visual.doubleBufferMode) {
+ /* GL_FRONT is not possible on GLES. Instead GL_BACK will render to either
+ * the front or the back buffer depending on the config */
+ if (ctx->Visual.doubleBufferMode || _mesa_is_gles(ctx)) {
ctx->Color.DrawBuffer[0] = GL_BACK;
}
else {
ctx->Color.DrawBuffer[0] = GL_FRONT;
}
- ctx->Color.ClampFragmentColor = GL_FIXED_ONLY_ARB;
- ctx->Color._ClampFragmentColor = GL_TRUE;
+ ctx->Color.ClampFragmentColor = ctx->API == API_OPENGL_COMPAT ?
+ GL_FIXED_ONLY_ARB : GL_FALSE;
+ ctx->Color._ClampFragmentColor = GL_FALSE;
ctx->Color.ClampReadColor = GL_FIXED_ONLY_ARB;
- ctx->Color._ClampReadColor = GL_TRUE;
if (ctx->API == API_OPENGLES2) {
/* GLES 3 behaves as though GL_FRAMEBUFFER_SRGB is always enabled. */
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