X-Git-Url: https://git.libre-soc.org/?a=blobdiff_plain;f=src%2Fmesa%2Fmain%2Fblend.c;h=98d28581d26ed9925378fa046c0b6af368068986;hb=6fd29e6c31e14e7b0f3c530798a1fc983eee17af;hp=98c14f5617115fd8420c004f446e3b940e51aded;hpb=2836aab2031d5b6926923fbc70f867ec638301bd;p=mesa.git diff --git a/src/mesa/main/blend.c b/src/mesa/main/blend.c index 98c14f56171..98d28581d26 100644 --- a/src/mesa/main/blend.c +++ b/src/mesa/main/blend.c @@ -5,7 +5,6 @@ /* * Mesa 3-D graphics library - * Version: 6.5.1 * * Copyright (C) 1999-2006 Brian Paul All Rights Reserved. * @@ -22,9 +21,10 @@ * 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. */ @@ -48,7 +48,6 @@ legal_src_factor(const struct gl_context *ctx, GLenum factor) 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: @@ -58,11 +57,18 @@ legal_src_factor(const struct gl_context *ctx, GLenum factor) case GL_DST_ALPHA: case GL_ONE_MINUS_DST_ALPHA: case GL_SRC_ALPHA_SATURATE: + return GL_TRUE; case GL_CONSTANT_COLOR: case GL_ONE_MINUS_CONSTANT_COLOR: case GL_CONSTANT_ALPHA: case GL_ONE_MINUS_CONSTANT_ALPHA: - return GL_TRUE; + return _mesa_is_desktop_gl(ctx) || ctx->API == API_OPENGLES2; + case GL_SRC1_COLOR: + case GL_SRC1_ALPHA: + case GL_ONE_MINUS_SRC1_COLOR: + case GL_ONE_MINUS_SRC1_ALPHA: + return _mesa_is_desktop_gl(ctx) + && ctx->Extensions.ARB_blend_func_extended; default: return GL_FALSE; } @@ -79,7 +85,6 @@ legal_dst_factor(const struct gl_context *ctx, GLenum factor) 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: @@ -88,11 +93,22 @@ legal_dst_factor(const struct gl_context *ctx, GLenum factor) case GL_ONE_MINUS_SRC_ALPHA: case GL_DST_ALPHA: case GL_ONE_MINUS_DST_ALPHA: + return GL_TRUE; case GL_CONSTANT_COLOR: case GL_ONE_MINUS_CONSTANT_COLOR: case GL_CONSTANT_ALPHA: case GL_ONE_MINUS_CONSTANT_ALPHA: - return GL_TRUE; + return _mesa_is_desktop_gl(ctx) || ctx->API == API_OPENGLES2; + case GL_SRC_ALPHA_SATURATE: + return (_mesa_is_desktop_gl(ctx) + && ctx->Extensions.ARB_blend_func_extended) + || _mesa_is_gles3(ctx); + case GL_SRC1_COLOR: + case GL_SRC1_ALPHA: + case GL_ONE_MINUS_SRC1_COLOR: + case GL_ONE_MINUS_SRC1_ALPHA: + return _mesa_is_desktop_gl(ctx) + && ctx->Extensions.ARB_blend_func_extended; default: return GL_FALSE; } @@ -112,28 +128,28 @@ validate_blend_factors(struct gl_context *ctx, const char *func, if (!legal_src_factor(ctx, sfactorRGB)) { _mesa_error(ctx, GL_INVALID_ENUM, "%s(sfactorRGB = %s)", func, - _mesa_lookup_enum_by_nr(sfactorRGB)); + _mesa_enum_to_string(sfactorRGB)); return GL_FALSE; } if (!legal_dst_factor(ctx, dfactorRGB)) { _mesa_error(ctx, GL_INVALID_ENUM, "%s(dfactorRGB = %s)", func, - _mesa_lookup_enum_by_nr(dfactorRGB)); + _mesa_enum_to_string(dfactorRGB)); return GL_FALSE; } if (sfactorA != sfactorRGB && !legal_src_factor(ctx, sfactorA)) { _mesa_error(ctx, GL_INVALID_ENUM, "%s(sfactorA = %s)", func, - _mesa_lookup_enum_by_nr(sfactorA)); + _mesa_enum_to_string(sfactorA)); return GL_FALSE; } if (dfactorA != dfactorRGB && !legal_dst_factor(ctx, dfactorA)) { _mesa_error(ctx, GL_INVALID_ENUM, "%s(dfactorA = %s)", func, - _mesa_lookup_enum_by_nr(dfactorA)); + _mesa_enum_to_string(dfactorA)); return GL_FALSE; } @@ -152,9 +168,27 @@ validate_blend_factors(struct gl_context *ctx, const char *func, void GLAPIENTRY _mesa_BlendFunc( GLenum sfactor, GLenum dfactor ) { - _mesa_BlendFuncSeparateEXT(sfactor, dfactor, sfactor, dfactor); + _mesa_BlendFuncSeparate(sfactor, dfactor, sfactor, dfactor); +} + +static GLboolean +blend_factor_is_dual_src(GLenum factor) +{ + return (factor == GL_SRC1_COLOR || + factor == GL_SRC1_ALPHA || + factor == GL_ONE_MINUS_SRC1_COLOR || + factor == GL_ONE_MINUS_SRC1_ALPHA); } +static void +update_uses_dual_src(struct gl_context *ctx, int buf) +{ + ctx->Color.Blend[buf]._UsesDualSrc = + (blend_factor_is_dual_src(ctx->Color.Blend[buf].SrcRGB) || + blend_factor_is_dual_src(ctx->Color.Blend[buf].DstRGB) || + blend_factor_is_dual_src(ctx->Color.Blend[buf].SrcA) || + blend_factor_is_dual_src(ctx->Color.Blend[buf].DstA)); +} /** * Set the separate blend source/dest factors for all draw buffers. @@ -165,43 +199,55 @@ _mesa_BlendFunc( GLenum sfactor, GLenum dfactor ) * \param dfactorA alpha destination factor operator. */ void GLAPIENTRY -_mesa_BlendFuncSeparateEXT( GLenum sfactorRGB, GLenum dfactorRGB, +_mesa_BlendFuncSeparate( GLenum sfactorRGB, GLenum dfactorRGB, GLenum sfactorA, GLenum dfactorA ) { GLuint buf, numBuffers; - GLboolean changed; + bool changed = false; GET_CURRENT_CONTEXT(ctx); - ASSERT_OUTSIDE_BEGIN_END(ctx); if (MESA_VERBOSE & VERBOSE_API) _mesa_debug(ctx, "glBlendFuncSeparate %s %s %s %s\n", - _mesa_lookup_enum_by_nr(sfactorRGB), - _mesa_lookup_enum_by_nr(dfactorRGB), - _mesa_lookup_enum_by_nr(sfactorA), - _mesa_lookup_enum_by_nr(dfactorA)); - - if (!validate_blend_factors(ctx, "glBlendFuncSeparate", - sfactorRGB, dfactorRGB, - sfactorA, dfactorA)) { - return; - } + _mesa_enum_to_string(sfactorRGB), + _mesa_enum_to_string(dfactorRGB), + _mesa_enum_to_string(sfactorA), + _mesa_enum_to_string(dfactorA)); numBuffers = ctx->Extensions.ARB_draw_buffers_blend ? ctx->Const.MaxDrawBuffers : 1; - changed = GL_FALSE; - for (buf = 0; buf < numBuffers; buf++) { - if (ctx->Color.Blend[buf].SrcRGB != sfactorRGB || - ctx->Color.Blend[buf].DstRGB != dfactorRGB || - ctx->Color.Blend[buf].SrcA != sfactorA || - ctx->Color.Blend[buf].DstA != dfactorA) { - changed = GL_TRUE; - break; + /* Check if we're really changing any state. If not, return early. */ + if (ctx->Color._BlendFuncPerBuffer) { + /* Check all per-buffer states */ + for (buf = 0; buf < numBuffers; buf++) { + if (ctx->Color.Blend[buf].SrcRGB != sfactorRGB || + ctx->Color.Blend[buf].DstRGB != dfactorRGB || + ctx->Color.Blend[buf].SrcA != sfactorA || + ctx->Color.Blend[buf].DstA != dfactorA) { + changed = true; + break; + } } } + else { + /* only need to check 0th per-buffer state */ + if (ctx->Color.Blend[0].SrcRGB != sfactorRGB || + ctx->Color.Blend[0].DstRGB != dfactorRGB || + ctx->Color.Blend[0].SrcA != sfactorA || + ctx->Color.Blend[0].DstA != dfactorA) { + changed = true; + } + } + if (!changed) return; + if (!validate_blend_factors(ctx, "glBlendFuncSeparate", + sfactorRGB, dfactorRGB, + sfactorA, dfactorA)) { + return; + } + FLUSH_VERTICES(ctx, _NEW_COLOR); for (buf = 0; buf < numBuffers; buf++) { @@ -209,6 +255,7 @@ _mesa_BlendFuncSeparateEXT( GLenum sfactorRGB, GLenum dfactorRGB, ctx->Color.Blend[buf].DstRGB = dfactorRGB; ctx->Color.Blend[buf].SrcA = sfactorA; ctx->Color.Blend[buf].DstA = dfactorA; + update_uses_dual_src(ctx, buf); } ctx->Color._BlendFuncPerBuffer = GL_FALSE; @@ -219,16 +266,13 @@ _mesa_BlendFuncSeparateEXT( GLenum sfactorRGB, GLenum dfactorRGB, } -#if _HAVE_FULL_GL - - /** * Set blend source/dest factors for one color buffer/target. */ void GLAPIENTRY -_mesa_BlendFunci(GLuint buf, GLenum sfactor, GLenum dfactor) +_mesa_BlendFunciARB(GLuint buf, GLenum sfactor, GLenum dfactor) { - _mesa_BlendFuncSeparatei(buf, sfactor, dfactor, sfactor, dfactor); + _mesa_BlendFuncSeparateiARB(buf, sfactor, dfactor, sfactor, dfactor); } @@ -236,11 +280,10 @@ _mesa_BlendFunci(GLuint buf, GLenum sfactor, GLenum dfactor) * Set separate blend source/dest factors for one color buffer/target. */ void GLAPIENTRY -_mesa_BlendFuncSeparatei(GLuint buf, GLenum sfactorRGB, GLenum dfactorRGB, +_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()"); @@ -271,12 +314,8 @@ _mesa_BlendFuncSeparatei(GLuint buf, GLenum sfactorRGB, GLenum dfactorRGB, ctx->Color.Blend[buf].DstRGB = dfactorRGB; ctx->Color.Blend[buf].SrcA = sfactorA; ctx->Color.Blend[buf].DstA = dfactorA; + update_uses_dual_src(ctx, buf); ctx->Color._BlendFuncPerBuffer = GL_TRUE; - - if (ctx->Driver.BlendFuncSeparatei) { - ctx->Driver.BlendFuncSeparatei(ctx, buf, sfactorRGB, dfactorRGB, - sfactorA, dfactorA); - } } @@ -289,13 +328,12 @@ legal_blend_equation(const struct gl_context *ctx, GLenum mode) { switch (mode) { case GL_FUNC_ADD: + case GL_FUNC_SUBTRACT: + case GL_FUNC_REVERSE_SUBTRACT: return GL_TRUE; case GL_MIN: case GL_MAX: return ctx->Extensions.EXT_blend_minmax; - case GL_FUNC_SUBTRACT: - case GL_FUNC_REVERSE_SUBTRACT: - return ctx->Extensions.EXT_blend_subtract; default: return GL_FALSE; } @@ -309,11 +347,10 @@ _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", - _mesa_lookup_enum_by_nr(mode)); + _mesa_enum_to_string(mode)); if (!legal_blend_equation(ctx, mode)) { _mesa_error(ctx, GL_INVALID_ENUM, "glBlendEquation"); @@ -350,14 +387,13 @@ _mesa_BlendEquation( GLenum mode ) * Set blend equation for one color buffer/target. */ void GLAPIENTRY -_mesa_BlendEquationi(GLuint buf, GLenum mode) +_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", - buf, _mesa_lookup_enum_by_nr(mode)); + buf, _mesa_enum_to_string(mode)); if (buf >= ctx->Const.MaxDrawBuffers) { _mesa_error(ctx, GL_INVALID_VALUE, "glBlendFuncSeparatei(buffer=%u)", @@ -378,24 +414,20 @@ _mesa_BlendEquationi(GLuint buf, GLenum mode) ctx->Color.Blend[buf].EquationRGB = mode; ctx->Color.Blend[buf].EquationA = mode; ctx->Color._BlendEquationPerBuffer = GL_TRUE; - - if (ctx->Driver.BlendEquationSeparatei) - ctx->Driver.BlendEquationSeparatei(ctx, buf, mode, mode); } void GLAPIENTRY -_mesa_BlendEquationSeparateEXT( GLenum modeRGB, GLenum modeA ) +_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", - _mesa_lookup_enum_by_nr(modeRGB), - _mesa_lookup_enum_by_nr(modeA)); + _mesa_enum_to_string(modeRGB), + _mesa_enum_to_string(modeA)); if ( (modeRGB != modeA) && !ctx->Extensions.EXT_blend_equation_separate ) { _mesa_error(ctx, GL_INVALID_OPERATION, @@ -443,15 +475,14 @@ _mesa_BlendEquationSeparateEXT( GLenum modeRGB, GLenum modeA ) * Set separate blend equations for one color buffer/target. */ void GLAPIENTRY -_mesa_BlendEquationSeparatei(GLuint buf, GLenum modeRGB, GLenum modeA) +_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, - _mesa_lookup_enum_by_nr(modeRGB), - _mesa_lookup_enum_by_nr(modeA)); + _mesa_enum_to_string(modeRGB), + _mesa_enum_to_string(modeA)); if (buf >= ctx->Const.MaxDrawBuffers) { _mesa_error(ctx, GL_INVALID_VALUE, "glBlendEquationSeparatei(buffer=%u)", @@ -477,16 +508,9 @@ _mesa_BlendEquationSeparatei(GLuint buf, GLenum modeRGB, GLenum modeA) ctx->Color.Blend[buf].EquationRGB = modeRGB; ctx->Color.Blend[buf].EquationA = modeA; ctx->Color._BlendEquationPerBuffer = GL_TRUE; - - if (ctx->Driver.BlendEquationSeparatei) - ctx->Driver.BlendEquationSeparatei(ctx, buf, modeRGB, modeA); } - -#endif /* _HAVE_FULL_GL */ - - /** * Set the blending color. * @@ -506,7 +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; @@ -543,11 +566,13 @@ 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", - _mesa_lookup_enum_by_nr(func), ref); + _mesa_enum_to_string(func), ref); + + if (ctx->Color.AlphaFunc == func && ctx->Color.AlphaRefUnclamped == ref) + return; /* no change */ switch (func) { case GL_NEVER: @@ -558,9 +583,6 @@ _mesa_AlphaFunc( GLenum func, GLclampf ref ) case GL_NOTEQUAL: case GL_GEQUAL: case GL_ALWAYS: - if (ctx->Color.AlphaFunc == func && ctx->Color.AlphaRefUnclamped == ref) - return; /* no change */ - FLUSH_VERTICES(ctx, _NEW_COLOR); ctx->Color.AlphaFunc = func; ctx->Color.AlphaRefUnclamped = ref; @@ -591,10 +613,9 @@ 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)); + _mesa_debug(ctx, "glLogicOp(%s)\n", _mesa_enum_to_string(opcode)); switch (opcode) { case GL_CLEAR: @@ -629,12 +650,11 @@ _mesa_LogicOp( GLenum opcode ) ctx->Driver.LogicOpcode( ctx, opcode ); } -#if _HAVE_FULL_GL + void GLAPIENTRY _mesa_IndexMask( GLuint mask ) { GET_CURRENT_CONTEXT(ctx); - ASSERT_OUTSIDE_BEGIN_END(ctx); if (ctx->Color.IndexMask == mask) return; @@ -642,7 +662,6 @@ _mesa_IndexMask( GLuint mask ) FLUSH_VERTICES(ctx, _NEW_COLOR); ctx->Color.IndexMask = mask; } -#endif /** @@ -667,7 +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", @@ -701,12 +719,11 @@ _mesa_ColorMask( GLboolean red, GLboolean green, * For GL_EXT_draw_buffers2 and GL3 */ void GLAPIENTRY -_mesa_ColorMaskIndexed( GLuint buf, GLboolean red, GLboolean green, +_mesa_ColorMaski( GLuint buf, GLboolean red, GLboolean green, GLboolean blue, GLboolean alpha ) { 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", @@ -730,19 +747,14 @@ _mesa_ColorMaskIndexed( GLuint buf, GLboolean red, GLboolean green, FLUSH_VERTICES(ctx, _NEW_COLOR); COPY_4UBV(ctx->Color.ColorMask[buf], tmp); - - if (ctx->Driver.ColorMaskIndexed) - ctx->Driver.ColorMaskIndexed(ctx, buf, red, green, blue, alpha); } void GLAPIENTRY -_mesa_ClampColorARB(GLenum target, GLenum clamp) +_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; @@ -750,25 +762,118 @@ _mesa_ClampColorARB(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, ctx->DrawBuffer); 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, ctx->DrawBuffer); 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_enum_to_string(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, + const struct gl_framebuffer *drawFb) +{ + return get_clamp_color(drawFb, ctx->Color.ClampFragmentColor); } +GLboolean +_mesa_get_clamp_vertex_color(const struct gl_context *ctx, + const struct gl_framebuffer *drawFb) +{ + return get_clamp_color(drawFb, ctx->Light.ClampVertexColor); +} + +GLboolean +_mesa_get_clamp_read_color(const struct gl_context *ctx, + const struct gl_framebuffer *readFb) +{ + return get_clamp_color(readFb, ctx->Color.ClampReadColor); +} + +/** + * Update the ctx->Color._ClampFragmentColor field + */ +void +_mesa_update_clamp_fragment_color(struct gl_context *ctx, + const struct gl_framebuffer *drawFb) +{ + /* Don't clamp if: + * - there is no colorbuffer + * - all colorbuffers are unsigned normalized, so clamping has no effect + * - there is an integer colorbuffer + */ + if (!drawFb || !drawFb->_HasSNormOrFloatColorBuffer || + drawFb->_IntegerColor) + ctx->Color._ClampFragmentColor = GL_FALSE; + else + ctx->Color._ClampFragmentColor = + _mesa_get_clamp_fragment_color(ctx, drawFb); +} +/** + * Update the ctx->Color._ClampVertexColor field + */ +void +_mesa_update_clamp_vertex_color(struct gl_context *ctx, + const struct gl_framebuffer *drawFb) +{ + ctx->Light._ClampVertexColor = + _mesa_get_clamp_vertex_color(ctx, drawFb); +} +/** + * 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 */ @@ -795,7 +900,7 @@ void _mesa_init_color( struct gl_context * ctx ) ctx->Color.AlphaFunc = GL_ALWAYS; ctx->Color.AlphaRef = 0; ctx->Color.BlendEnabled = 0x0; - for (i = 0; i < Elements(ctx->Color.Blend); i++) { + for (i = 0; i < ARRAY_SIZE(ctx->Color.Blend); i++) { ctx->Color.Blend[i].SrcRGB = GL_ONE; ctx->Color.Blend[i].DstRGB = GL_ZERO; ctx->Color.Blend[i].SrcA = GL_ONE; @@ -810,17 +915,24 @@ void _mesa_init_color( struct gl_context * ctx ) 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; + + /* GLES 1/2/3 behaves as though GL_FRAMEBUFFER_SRGB is always enabled + * if EGL_KHR_gl_colorspace has been used to request sRGB. + */ + ctx->Color.sRGBEnabled = _mesa_is_gles(ctx); } /*@}*/