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mesa: glsl: fix glGetUniform for matrix queries

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This commit is contained in:
Brian Paul
2008-08-06 13:07:09 -06:00
parent 18cd9c229a
commit 7a6eba54d0
1 changed files with 80 additions and 51 deletions
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131
src/mesa/shader/shader_api.c
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@@ -996,6 +996,71 @@ _mesa_get_shader_source(GLcontext *ctx, GLuint shader, GLsizei maxLength,
}
static void
get_matrix_dims(GLenum type, GLint *rows, GLint *cols)
{
switch (type) {
case GL_FLOAT_MAT2:
*rows = *cols = 2;
break;
case GL_FLOAT_MAT2x3:
*rows = 3;
*cols = 2;
break;
case GL_FLOAT_MAT2x4:
*rows = 4;
*cols = 2;
break;
case GL_FLOAT_MAT3:
*rows = 3;
*cols = 3;
break;
case GL_FLOAT_MAT3x2:
*rows = 2;
*cols = 3;
break;
case GL_FLOAT_MAT3x4:
*rows = 4;
*cols = 3;
break;
case GL_FLOAT_MAT4:
*rows = 4;
*cols = 4;
break;
case GL_FLOAT_MAT4x2:
*rows = 2;
*cols = 4;
break;
case GL_FLOAT_MAT4x3:
*rows = 3;
*cols = 4;
break;
default:
*rows = *cols = 0;
}
}
/**
* Determine the number of rows and columns occupied by a uniform
* according to its datatype.
*/
static void
get_uniform_rows_cols(const struct gl_program_parameter *p,
GLint *rows, GLint *cols)
{
get_matrix_dims(p->DataType, rows, cols);
if (*rows == 0 && *cols == 0) {
/* not a matrix type, probably a float or vector */
*rows = p->Size / 4 + 1;
if (p->Size % 4 == 0)
*cols = 4;
else
*cols = p->Size % 4;
}
}
#define MAX_UNIFORM_ELEMENTS 16
/**
@@ -1012,7 +1077,6 @@ get_uniformfv(GLcontext *ctx, GLuint program, GLint location,
if (shProg->Uniforms &&
location >= 0 && location < (GLint) shProg->Uniforms->NumUniforms) {
GLint progPos;
GLuint i;
const struct gl_program *prog = NULL;
progPos = shProg->Uniforms->Uniforms[location].VertPos;
@@ -1028,13 +1092,23 @@ get_uniformfv(GLcontext *ctx, GLuint program, GLint location,
ASSERT(prog);
if (prog) {
/* See uniformiv() below */
assert(prog->Parameters->Parameters[progPos].Size <= MAX_UNIFORM_ELEMENTS);
const struct gl_program_parameter *p =
&prog->Parameters->Parameters[progPos];
GLint rows, cols, i, j, k;
for (i = 0; i < prog->Parameters->Parameters[progPos].Size; i++) {
params[i] = prog->Parameters->ParameterValues[progPos][i];
/* See uniformiv() below */
assert(p->Size <= MAX_UNIFORM_ELEMENTS);
get_uniform_rows_cols(p, &rows, &cols);
k = 0;
for (i = 0; i < rows; i++) {
for (j = 0; j < cols; j++ ) {
params[k++] = prog->Parameters->ParameterValues[progPos+i][j];
}
}
return prog->Parameters->Parameters[progPos].Size;
return p->Size;
}
}
else {
@@ -1415,51 +1489,6 @@ _mesa_uniform(GLcontext *ctx, GLint location, GLsizei count,
}
static void
get_matrix_dims(GLenum type, GLint *rows, GLint *cols)
{
switch (type) {
case GL_FLOAT_MAT2:
*rows = *cols = 2;
break;
case GL_FLOAT_MAT2x3:
*rows = 3;
*cols = 2;
break;
case GL_FLOAT_MAT2x4:
*rows = 4;
*cols = 2;
break;
case GL_FLOAT_MAT3:
*rows = 3;
*cols = 3;
break;
case GL_FLOAT_MAT3x2:
*rows = 2;
*cols = 3;
break;
case GL_FLOAT_MAT3x4:
*rows = 4;
*cols = 3;
break;
case GL_FLOAT_MAT4:
*rows = 4;
*cols = 4;
break;
case GL_FLOAT_MAT4x2:
*rows = 2;
*cols = 4;
break;
case GL_FLOAT_MAT4x3:
*rows = 3;
*cols = 4;
break;
default:
*rows = *cols = 0;
}
}
static void
set_program_uniform_matrix(GLcontext *ctx, struct gl_program *program,
GLuint location, GLuint count,