/**
* Set separate blend equations for one color buffer/target.
*/
void GLAPIENTRY
_mesa_BlendEquationSeparateiARB(GLuint buf, GLenum modeRGB, GLenum modeA)
{
GET_CURRENT_CONTEXT(ctx);
if (MESA_VERBOSE & VERBOSE_API)
_mesa_debug(ctx, "glBlendEquationSeparatei(%u, %s %s)\n", buf,
_mesa_enum_to_string(modeRGB),
_mesa_enum_to_string(modeA));
if (buf >= ctx->Const.MaxDrawBuffers) {
_mesa_error(ctx, GL_INVALID_VALUE, "glBlendEquationSeparatei(buffer=%u)",
buf);
return;
}
/* Only allow simple blending equations.
* The GL_KHR_blend_equation_advanced spec says:
*
* "NOTE: These enums are not accepted by the <modeRGB> or <modeAlpha>
* parameters of BlendEquationSeparate or BlendEquationSeparatei."
*/
if (!legal_simple_blend_equation(ctx, modeRGB)) {
_mesa_error(ctx, GL_INVALID_ENUM, "glBlendEquationSeparatei(modeRGB)");
return;
}
if (!legal_simple_blend_equation(ctx, modeA)) {
_mesa_error(ctx, GL_INVALID_ENUM, "glBlendEquationSeparatei(modeA)");
return;
}
blend_equation_separatei(ctx, buf, modeRGB, modeA);
}
/**
* Set blend equation for one color buffer/target.
*/
void GLAPIENTRY
_mesa_BlendEquationiARB(GLuint buf, GLenum mode)
{
GET_CURRENT_CONTEXT(ctx);
enum gl_advanced_blend_mode advanced_mode = advanced_blend_mode(ctx, mode);
if (MESA_VERBOSE & VERBOSE_API)
_mesa_debug(ctx, "glBlendEquationi(%u, %s)\n",
buf, _mesa_enum_to_string(mode));
if (buf >= ctx->Const.MaxDrawBuffers) {
_mesa_error(ctx, GL_INVALID_VALUE, "glBlendEquationi(buffer=%u)",
buf);
return;
}
if (!legal_simple_blend_equation(ctx, mode) && !advanced_mode) {
_mesa_error(ctx, GL_INVALID_ENUM, "glBlendEquationi");
return;
}
if (ctx->Color.Blend[buf].EquationRGB == mode &&
ctx->Color.Blend[buf].EquationA == mode)
return; /* no change */
FLUSH_VERTICES(ctx, _NEW_COLOR);
ctx->Color.Blend[buf].EquationRGB = mode;
ctx->Color.Blend[buf].EquationA = mode;
ctx->Color._BlendEquationPerBuffer = GL_TRUE;
if (buf == 0)
ctx->Color._AdvancedBlendMode = advanced_mode;
}
/**
* Set separate blend equations for one color buffer/target.
*/
void GLAPIENTRY
_mesa_BlendEquationSeparateiARB(GLuint buf, GLenum modeRGB, GLenum modeA)
{
GET_CURRENT_CONTEXT(ctx);
if (MESA_VERBOSE & VERBOSE_API)
_mesa_debug(ctx, "glBlendEquationSeparatei(%u, %s %s)\n", buf,
_mesa_enum_to_string(modeRGB),
_mesa_enum_to_string(modeA));
if (buf >= ctx->Const.MaxDrawBuffers) {
_mesa_error(ctx, GL_INVALID_VALUE, "glBlendEquationSeparatei(buffer=%u)",
buf);
return;
}
/* Only allow simple blending equations.
* The GL_KHR_blend_equation_advanced spec says:
*
* "NOTE: These enums are not accepted by the <modeRGB> or <modeAlpha>
* parameters of BlendEquationSeparate or BlendEquationSeparatei."
*/
if (!legal_simple_blend_equation(ctx, modeRGB)) {
_mesa_error(ctx, GL_INVALID_ENUM, "glBlendEquationSeparatei(modeRGB)");
return;
}
if (!legal_simple_blend_equation(ctx, modeA)) {
_mesa_error(ctx, GL_INVALID_ENUM, "glBlendEquationSeparatei(modeA)");
return;
}
if (ctx->Color.Blend[buf].EquationRGB == modeRGB &&
ctx->Color.Blend[buf].EquationA == modeA)
return; /* no change */
FLUSH_VERTICES(ctx, _NEW_COLOR);
ctx->Color.Blend[buf].EquationRGB = modeRGB;
ctx->Color.Blend[buf].EquationA = modeA;
ctx->Color._BlendEquationPerBuffer = GL_TRUE;
ctx->Color._AdvancedBlendMode = BLEND_NONE;
}
/* This is really an extension function! */
void GLAPIENTRY
_mesa_BlendEquation( GLenum mode )
{
GET_CURRENT_CONTEXT(ctx);
const unsigned numBuffers = num_buffers(ctx);
unsigned buf;
bool changed = false;
enum gl_advanced_blend_mode advanced_mode = advanced_blend_mode(ctx, mode);
if (MESA_VERBOSE & VERBOSE_API)
_mesa_debug(ctx, "glBlendEquation(%s)\n",
_mesa_enum_to_string(mode));
if (ctx->Color._BlendEquationPerBuffer) {
/* Check all per-buffer states */
for (buf = 0; buf < numBuffers; buf++) {
if (ctx->Color.Blend[buf].EquationRGB != mode ||
ctx->Color.Blend[buf].EquationA != mode) {
changed = true;
break;
}
}
}
else {
/* only need to check 0th per-buffer state */
if (ctx->Color.Blend[0].EquationRGB != mode ||
ctx->Color.Blend[0].EquationA != mode) {
changed = true;
}
}
if (!changed)
return;
if (!legal_simple_blend_equation(ctx, mode) && !advanced_mode) {
_mesa_error(ctx, GL_INVALID_ENUM, "glBlendEquation");
return;
}
FLUSH_VERTICES(ctx, _NEW_COLOR);
for (buf = 0; buf < numBuffers; buf++) {
ctx->Color.Blend[buf].EquationRGB = mode;
ctx->Color.Blend[buf].EquationA = mode;
}
ctx->Color._BlendEquationPerBuffer = GL_FALSE;
ctx->Color._AdvancedBlendMode = advanced_mode;
if (ctx->Driver.BlendEquationSeparate)
ctx->Driver.BlendEquationSeparate(ctx, mode, mode);
}
void GLAPIENTRY
_mesa_BlendEquationSeparate( GLenum modeRGB, GLenum modeA )
{
GET_CURRENT_CONTEXT(ctx);
const unsigned numBuffers = num_buffers(ctx);
unsigned buf;
bool changed = false;
if (MESA_VERBOSE & VERBOSE_API)
_mesa_debug(ctx, "glBlendEquationSeparateEXT(%s %s)\n",
_mesa_enum_to_string(modeRGB),
_mesa_enum_to_string(modeA));
if (ctx->Color._BlendEquationPerBuffer) {
/* Check all per-buffer states */
for (buf = 0; buf < numBuffers; buf++) {
if (ctx->Color.Blend[buf].EquationRGB != modeRGB ||
ctx->Color.Blend[buf].EquationA != modeA) {
changed = true;
break;
}
}
}
else {
/* only need to check 0th per-buffer state */
if (ctx->Color.Blend[0].EquationRGB != modeRGB ||
ctx->Color.Blend[0].EquationA != modeA) {
changed = true;
}
}
if (!changed)
return;
if ( (modeRGB != modeA) && !ctx->Extensions.EXT_blend_equation_separate ) {
_mesa_error(ctx, GL_INVALID_OPERATION,
"glBlendEquationSeparateEXT not supported by driver");
return;
}
/* Only allow simple blending equations.
* The GL_KHR_blend_equation_advanced spec says:
*
* "NOTE: These enums are not accepted by the <modeRGB> or <modeAlpha>
* parameters of BlendEquationSeparate or BlendEquationSeparatei."
*/
if (!legal_simple_blend_equation(ctx, modeRGB)) {
_mesa_error(ctx, GL_INVALID_ENUM, "glBlendEquationSeparateEXT(modeRGB)");
return;
}
if (!legal_simple_blend_equation(ctx, modeA)) {
_mesa_error(ctx, GL_INVALID_ENUM, "glBlendEquationSeparateEXT(modeA)");
return;
}
FLUSH_VERTICES(ctx, _NEW_COLOR);
for (buf = 0; buf < numBuffers; buf++) {
ctx->Color.Blend[buf].EquationRGB = modeRGB;
ctx->Color.Blend[buf].EquationA = modeA;
}
ctx->Color._BlendEquationPerBuffer = GL_FALSE;
ctx->Color._AdvancedBlendMode = BLEND_NONE;
if (ctx->Driver.BlendEquationSeparate)
ctx->Driver.BlendEquationSeparate(ctx, modeRGB, modeA);
}
