static void GLAPIENTRY
_mesa_GetHistogram(GLenum target, GLboolean reset, GLenum format, GLenum type, GLvoid *values)
{
GET_CURRENT_CONTEXT(ctx);
ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
if (!ctx->Extensions.EXT_histogram && !ctx->Extensions.ARB_imaging) {
_mesa_error(ctx, GL_INVALID_OPERATION, "glGetHistogram");
return;
}
if (target != GL_HISTOGRAM) {
_mesa_error(ctx, GL_INVALID_ENUM, "glGetHistogram(target)");
return;
}
if (format != GL_RED &&
format != GL_GREEN &&
format != GL_BLUE &&
format != GL_ALPHA &&
format != GL_RGB &&
format != GL_BGR &&
format != GL_RGBA &&
format != GL_BGRA &&
format != GL_ABGR_EXT &&
format != GL_LUMINANCE &&
format != GL_LUMINANCE_ALPHA) {
_mesa_error(ctx, GL_INVALID_ENUM, "glGetHistogram(format)");
}
if (!_mesa_is_legal_format_and_type(ctx, format, type)) {
_mesa_error(ctx, GL_INVALID_OPERATION, "glGetHistogram(format or type)");
return;
}
values = _mesa_map_validate_pbo_dest(ctx, 1, &ctx->Pack,
ctx->Histogram.Width, 1, 1,
format, type, values,
"glGetHistogram");
if (!values)
return;
pack_histogram(ctx, ctx->Histogram.Width,
(CONST GLuint (*)[4]) ctx->Histogram.Count,
format, type, values, &ctx->Pack);
_mesa_unmap_pbo_dest(ctx, &ctx->Pack);
if (reset) {
GLuint i;
for (i = 0; i < HISTOGRAM_TABLE_SIZE; i++) {
ctx->Histogram.Count[i][0] = 0;
ctx->Histogram.Count[i][1] = 0;
ctx->Histogram.Count[i][2] = 0;
ctx->Histogram.Count[i][3] = 0;
}
}
}
void
_mesa_GetHistogram(GLenum target, GLboolean reset, GLenum format, GLenum type, GLvoid *values)
{
GET_CURRENT_CONTEXT(ctx);
ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
if (!ctx->Extensions.EXT_histogram && !ctx->Extensions.ARB_imaging) {
_mesa_error(ctx, GL_INVALID_OPERATION, "glGetHistogram");
return;
}
if (target != GL_HISTOGRAM) {
_mesa_error(ctx, GL_INVALID_ENUM, "glGetHistogram(target)");
return;
}
if (!_mesa_is_legal_format_and_type(format, type)) {
_mesa_error(ctx, GL_INVALID_OPERATION, "glGetHistogram(format or type)");
return;
}
if (type != GL_UNSIGNED_BYTE &&
type != GL_BYTE &&
type != GL_UNSIGNED_SHORT &&
type != GL_SHORT &&
type != GL_UNSIGNED_INT &&
type != GL_INT &&
type != GL_FLOAT &&
type != GL_UNSIGNED_BYTE_3_3_2 &&
type != GL_UNSIGNED_BYTE_2_3_3_REV &&
type != GL_UNSIGNED_SHORT_5_6_5 &&
type != GL_UNSIGNED_SHORT_5_6_5_REV &&
type != GL_UNSIGNED_SHORT_4_4_4_4 &&
type != GL_UNSIGNED_SHORT_4_4_4_4_REV &&
type != GL_UNSIGNED_SHORT_5_5_5_1 &&
type != GL_UNSIGNED_SHORT_1_5_5_5_REV &&
type != GL_UNSIGNED_INT_8_8_8_8 &&
type != GL_UNSIGNED_INT_8_8_8_8_REV &&
type != GL_UNSIGNED_INT_10_10_10_2 &&
type != GL_UNSIGNED_INT_2_10_10_10_REV) {
_mesa_error(ctx, GL_INVALID_ENUM, "glGetHistogram(type)");
return;
}
if (!values)
return;
pack_histogram(ctx, ctx->Histogram.Width,
(CONST GLuint (*)[4]) ctx->Histogram.Count,
format, type, values, &ctx->Pack);
if (reset) {
GLuint i;
for (i = 0; i < HISTOGRAM_TABLE_SIZE; i++) {
ctx->Histogram.Count[i][0] = 0;
ctx->Histogram.Count[i][1] = 0;
ctx->Histogram.Count[i][2] = 0;
ctx->Histogram.Count[i][3] = 0;
}
}
}
