mesa: Change "BRIAN PAUL" to "THE AUTHORS" in license text.

[mesa.git] / src / mesa / main / blend.c

diff --git a/src/mesa/main/blend.c b/src/mesa/main/blend.c
index 1930b1c37ce39bb6bfd720e9ed1fb1243b9e300f..b78dc32d54fb046c4a7315d2a3a2ab7f2f6e82b5 100644 (file)
--- a/src/mesa/main/blend.c
+++ b/src/mesa/main/blend.c
@@ -22,7 +22,7 @@
  * 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
+ * THE AUTHORS 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.
  */
@@ -207,7 +207,6 @@ _mesa_BlendFuncSeparate( GLenum sfactorRGB, GLenum dfactorRGB,
    GLuint buf, numBuffers;
    GLboolean changed;
    GET_CURRENT_CONTEXT(ctx);
-   ASSERT_OUTSIDE_BEGIN_END(ctx);
 
    if (MESA_VERBOSE & VERBOSE_API)
       _mesa_debug(ctx, "glBlendFuncSeparate %s %s %s %s\n",
@@ -274,7 +273,6 @@ _mesa_BlendFuncSeparateiARB(GLuint buf, GLenum sfactorRGB, GLenum dfactorRGB,
                          GLenum sfactorA, GLenum dfactorA)
 {
    GET_CURRENT_CONTEXT(ctx);
-   ASSERT_OUTSIDE_BEGIN_END(ctx);
 
    if (!ctx->Extensions.ARB_draw_buffers_blend) {
       _mesa_error(ctx, GL_INVALID_OPERATION, "glBlendFunc[Separate]i()");
@@ -343,7 +341,6 @@ _mesa_BlendEquation( GLenum mode )
    GLuint buf, numBuffers;
    GLboolean changed;
    GET_CURRENT_CONTEXT(ctx);
-   ASSERT_OUTSIDE_BEGIN_END(ctx);
 
    if (MESA_VERBOSE & VERBOSE_API)
       _mesa_debug(ctx, "glBlendEquation(%s)\n",
@@ -387,7 +384,6 @@ void GLAPIENTRY
 _mesa_BlendEquationiARB(GLuint buf, GLenum mode)
 {
    GET_CURRENT_CONTEXT(ctx);
-   ASSERT_OUTSIDE_BEGIN_END(ctx);
 
    if (MESA_VERBOSE & VERBOSE_API)
       _mesa_debug(ctx, "glBlendEquationi(%u, %s)\n",
@@ -424,7 +420,6 @@ _mesa_BlendEquationSeparate( GLenum modeRGB, GLenum modeA )
    GLuint buf, numBuffers;
    GLboolean changed;
    GET_CURRENT_CONTEXT(ctx);
-   ASSERT_OUTSIDE_BEGIN_END(ctx);
 
    if (MESA_VERBOSE & VERBOSE_API)
       _mesa_debug(ctx, "glBlendEquationSeparateEXT(%s %s)\n",
@@ -480,7 +475,6 @@ void GLAPIENTRY
 _mesa_BlendEquationSeparateiARB(GLuint buf, GLenum modeRGB, GLenum modeA)
 {
    GET_CURRENT_CONTEXT(ctx);
-   ASSERT_OUTSIDE_BEGIN_END(ctx);
 
    if (MESA_VERBOSE & VERBOSE_API)
       _mesa_debug(ctx, "glBlendEquationSeparatei(%u, %s %s)\n", buf,
@@ -536,7 +530,6 @@ _mesa_BlendColor( GLclampf red, GLclampf green, GLclampf blue, GLclampf alpha )
 {
    GLfloat tmp[4];
    GET_CURRENT_CONTEXT(ctx);
-   ASSERT_OUTSIDE_BEGIN_END(ctx);
 
    tmp[0] = red;
    tmp[1] = green;
@@ -573,7 +566,6 @@ void GLAPIENTRY
 _mesa_AlphaFunc( GLenum func, GLclampf ref )
 {
    GET_CURRENT_CONTEXT(ctx);
-   ASSERT_OUTSIDE_BEGIN_END(ctx);
 
    if (MESA_VERBOSE & VERBOSE_API)
       _mesa_debug(ctx, "glAlphaFunc(%s, %f)\n",
@@ -621,7 +613,6 @@ void GLAPIENTRY
 _mesa_LogicOp( GLenum opcode )
 {
    GET_CURRENT_CONTEXT(ctx);
-   ASSERT_OUTSIDE_BEGIN_END(ctx);
 
    if (MESA_VERBOSE & VERBOSE_API)
       _mesa_debug(ctx, "glLogicOp(%s)\n", _mesa_lookup_enum_by_nr(opcode));
@@ -664,7 +655,6 @@ void GLAPIENTRY
 _mesa_IndexMask( GLuint mask )
 {
    GET_CURRENT_CONTEXT(ctx);
-   ASSERT_OUTSIDE_BEGIN_END(ctx);
 
    if (ctx->Color.IndexMask == mask)
       return;
@@ -696,7 +686,6 @@ _mesa_ColorMask( GLboolean red, GLboolean green,
    GLubyte tmp[4];
    GLuint i;
    GLboolean flushed;
-   ASSERT_OUTSIDE_BEGIN_END(ctx);
 
    if (MESA_VERBOSE & VERBOSE_API)
       _mesa_debug(ctx, "glColorMask(%d, %d, %d, %d)\n",
@@ -735,7 +724,6 @@ _mesa_ColorMaski( GLuint buf, GLboolean red, GLboolean green,
 {
    GLubyte tmp[4];
    GET_CURRENT_CONTEXT(ctx);
-   ASSERT_OUTSIDE_BEGIN_END(ctx);
 
    if (MESA_VERBOSE & VERBOSE_API)
       _mesa_debug(ctx, "glColorMaskIndexed %u %d %d %d %d\n",
@@ -770,8 +758,6 @@ _mesa_ClampColor(GLenum target, GLenum clamp)
 {
    GET_CURRENT_CONTEXT(ctx);
 
-   ASSERT_OUTSIDE_BEGIN_END(ctx);
-
    if (clamp != GL_TRUE && clamp != GL_FALSE && clamp != GL_FIXED_ONLY_ARB) {
       _mesa_error(ctx, GL_INVALID_ENUM, "glClampColorARB(clamp)");
       return;
@@ -779,24 +765,95 @@ _mesa_ClampColor(GLenum target, GLenum clamp)
 
    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);
+}
 
 
 /**********************************************************************/
@@ -846,10 +903,10 @@ void _mesa_init_color( struct gl_context * ctx )
       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. */