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glsl: Add built-in variables for GLSL ES 1.00.

This commit is contained in:
Kenneth Graunke 2010-08-07 02:45:33 -07:00
parent 76deef138e
commit b4fe4d52b6
2 changed files with 82 additions and 0 deletions
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7
src/glsl/builtin_variables.h
View File

@ -39,6 +39,13 @@ static const builtin_variable builtin_core_fs_variables[] = {
{ ir_var_in, FRAG_ATTRIB_WPOS, "vec4", "gl_FragCoord" },
{ ir_var_in, FRAG_ATTRIB_FACE, "bool", "gl_FrontFacing" },
{ ir_var_out, FRAG_RESULT_COLOR, "vec4", "gl_FragColor" },
};
static const builtin_variable builtin_100ES_fs_variables[] = {
{ ir_var_in, FRAG_ATTRIB_PNTC, "vec2", "gl_PointCoord" },
};
static const builtin_variable builtin_110_fs_variables[] = {
{ ir_var_out, FRAG_RESULT_DEPTH, "float", "gl_FragDepth" },
};

75
src/glsl/ir_variable.cpp
View File

@ -97,6 +97,32 @@ add_builtin_constant(exec_list *instructions,
var->constant_value = new(var) ir_constant(value);
}
/* Several constants in GLSL ES have different names than normal desktop GLSL.
* Therefore, this function should only be called on the ES path.
*/
static void
generate_100ES_uniforms(exec_list *instructions,
struct _mesa_glsl_parse_state *state)
{
add_builtin_constant(instructions, state, "gl_MaxVertexAttribs",
state->Const.MaxVertexAttribs);
add_builtin_constant(instructions, state, "gl_MaxVertexUniformVectors",
state->Const.MaxVertexUniformComponents);
add_builtin_constant(instructions, state, "gl_MaxVaryingVectors",
state->Const.MaxVaryingFloats / 4);
add_builtin_constant(instructions, state, "gl_MaxVertexTextureImageUnits",
state->Const.MaxVertexTextureImageUnits);
add_builtin_constant(instructions, state, "gl_MaxCombinedTextureImageUnits",
state->Const.MaxCombinedTextureImageUnits);
add_builtin_constant(instructions, state, "gl_MaxTextureImageUnits",
state->Const.MaxTextureImageUnits);
add_builtin_constant(instructions, state, "gl_MaxFragmentUniformVectors",
state->Const.MaxFragmentUniformComponents);
add_uniform(instructions, state, "gl_DepthRange",
state->symbols->get_type("gl_DepthRangeParameters"));
}
static void
generate_110_uniforms(exec_list *instructions,
struct _mesa_glsl_parse_state *state)
@ -189,6 +215,23 @@ generate_110_uniforms(exec_list *instructions,
state->symbols->get_type("gl_FogParameters"));
}
/* This function should only be called for ES, not desktop GL. */
static void
generate_100ES_vs_variables(exec_list *instructions,
struct _mesa_glsl_parse_state *state)
{
for (unsigned i = 0; i < Elements(builtin_core_vs_variables); i++) {
add_builtin_variable(& builtin_core_vs_variables[i],
instructions, state->symbols);
}
generate_100ES_uniforms(instructions, state);
generate_ARB_draw_buffers_variables(instructions, state, false,
vertex_shader);
}
static void
generate_110_vs_variables(exec_list *instructions,
struct _mesa_glsl_parse_state *state)
@ -264,6 +307,9 @@ initialize_vs_variables(exec_list *instructions,
{
switch (state->language_version) {
case 100:
generate_100ES_vs_variables(instructions, state);
break;
case 110:
generate_110_vs_variables(instructions, state);
break;
@ -276,6 +322,27 @@ initialize_vs_variables(exec_list *instructions,
}
}
/* This function should only be called for ES, not desktop GL. */
static void
generate_100ES_fs_variables(exec_list *instructions,
struct _mesa_glsl_parse_state *state)
{
for (unsigned i = 0; i < Elements(builtin_core_fs_variables); i++) {
add_builtin_variable(& builtin_core_fs_variables[i],
instructions, state->symbols);
}
for (unsigned i = 0; i < Elements(builtin_100ES_fs_variables); i++) {
add_builtin_variable(& builtin_100ES_fs_variables[i],
instructions, state->symbols);
}
generate_100ES_uniforms(instructions, state);
generate_ARB_draw_buffers_variables(instructions, state, false,
fragment_shader);
}
static void
generate_110_fs_variables(exec_list *instructions,
struct _mesa_glsl_parse_state *state)
@ -285,6 +352,11 @@ generate_110_fs_variables(exec_list *instructions,
instructions, state->symbols);
}
for (unsigned i = 0; i < Elements(builtin_110_fs_variables); i++) {
add_builtin_variable(& builtin_110_fs_variables[i],
instructions, state->symbols);
}
for (unsigned i = 0
; i < Elements(builtin_110_deprecated_fs_variables)
; i++) {
@ -382,6 +454,9 @@ initialize_fs_variables(exec_list *instructions,
{
switch (state->language_version) {
case 100:
generate_100ES_fs_variables(instructions, state);
break;
case 110:
generate_110_fs_variables(instructions, state);
break;