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mesa: add num_buffers() helper in blend.c

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Reviewed-by: Eric Anholt <eric@anholt.net>
This commit is contained in:
Brian Paul 2015-10-14 09:53:26 -06:00
parent dfbd62e772
commit d8c23d156d
1 changed files with 22 additions and 15 deletions
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37
src/mesa/main/blend.c
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@ -190,6 +190,19 @@ update_uses_dual_src(struct gl_context *ctx, int buf)
blend_factor_is_dual_src(ctx->Color.Blend[buf].DstA));
}
/**
* Return the number of per-buffer blend states to update in
* glBlendFunc, glBlendFuncSeparate, glBlendEquation, etc.
*/
static inline unsigned
num_buffers(const struct gl_context *ctx)
{
return ctx->Extensions.ARB_draw_buffers_blend
? ctx->Const.MaxDrawBuffers : 1;
}
/**
* Set the separate blend source/dest factors for all draw buffers.
*
@ -202,9 +215,10 @@ void GLAPIENTRY
_mesa_BlendFuncSeparate( GLenum sfactorRGB, GLenum dfactorRGB,
GLenum sfactorA, GLenum dfactorA )
{
GLuint buf, numBuffers;
bool changed = false;
GET_CURRENT_CONTEXT(ctx);
const unsigned numBuffers = num_buffers(ctx);
unsigned buf;
bool changed = false;
if (MESA_VERBOSE & VERBOSE_API)
_mesa_debug(ctx, "glBlendFuncSeparate %s %s %s %s\n",
@ -213,9 +227,6 @@ _mesa_BlendFuncSeparate( GLenum sfactorRGB, GLenum dfactorRGB,
_mesa_enum_to_string(sfactorA),
_mesa_enum_to_string(dfactorA));
numBuffers = ctx->Extensions.ARB_draw_buffers_blend
? ctx->Const.MaxDrawBuffers : 1;
/* Check if we're really changing any state. If not, return early. */
if (ctx->Color._BlendFuncPerBuffer) {
/* Check all per-buffer states */
@ -349,17 +360,15 @@ legal_blend_equation(const struct gl_context *ctx, GLenum mode)
void GLAPIENTRY
_mesa_BlendEquation( GLenum mode )
{
GLuint buf, numBuffers;
bool changed = false;
GET_CURRENT_CONTEXT(ctx);
const unsigned numBuffers = num_buffers(ctx);
unsigned buf;
bool changed = false;
if (MESA_VERBOSE & VERBOSE_API)
_mesa_debug(ctx, "glBlendEquation(%s)\n",
_mesa_enum_to_string(mode));
numBuffers = ctx->Extensions.ARB_draw_buffers_blend
? ctx->Const.MaxDrawBuffers : 1;
if (ctx->Color._BlendEquationPerBuffer) {
/* Check all per-buffer states */
for (buf = 0; buf < numBuffers; buf++) {
@ -436,18 +445,16 @@ _mesa_BlendEquationiARB(GLuint buf, GLenum mode)
void GLAPIENTRY
_mesa_BlendEquationSeparate( GLenum modeRGB, GLenum modeA )
{
GLuint buf, numBuffers;
bool changed = false;
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));
numBuffers = ctx->Extensions.ARB_draw_buffers_blend
? ctx->Const.MaxDrawBuffers : 1;
if (ctx->Color._BlendEquationPerBuffer) {
/* Check all per-buffer states */
for (buf = 0; buf < numBuffers; buf++) {