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LibGL: Implement GL_TEXTURE_ENV_COLOR

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This sets a constant color in the texture's environment for the fixed
function pipeline.
This commit is contained in:
Jelle Raaijmakers 2023-01-01 22:41:31 +01:00 committed by Andreas Kling
parent 9b50d74df2
commit 474f9e9c69
Notes: sideshowbarker 2024-07-17 04:32:07 +09:00 
Author: https://github.com/gmta
Commit: https://github.com/SerenityOS/serenity/commit/474f9e9c69
Pull-request: https://github.com/SerenityOS/serenity/pull/16766
8 changed files with 79 additions and 10 deletions
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20
Tests/LibGL/TestRender.cpp
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@ -299,3 +299,23 @@ TEST_CASE(0010_test_store_data_in_buffer)
context->present();
expect_bitmap_equals_reference(context->frontbuffer(), "0010_test_store_data_in_buffer"sv);
}
TEST_CASE(0011_tex_env_combine_with_constant_color)
{
auto context = create_testing_context(64, 64);
glEnable(GL_TEXTURE_2D);
glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_COMBINE);
glTexEnvi(GL_TEXTURE_ENV, GL_SRC0_RGB, GL_CONSTANT);
glTexEnvi(GL_TEXTURE_ENV, GL_COMBINE_RGB, GL_REPLACE);
float color[4] = { .3f, .5f, .7f, 1.f };
glTexEnvfv(GL_TEXTURE_ENV, GL_TEXTURE_ENV_COLOR, color);
glRecti(-1, -1, 1, 1);
EXPECT_EQ(glGetError(), 0u);
context->present();
expect_bitmap_equals_reference(context->frontbuffer(), "0011_tex_env_combine_with_constant_color"sv);
}

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Tests/LibGL/reference-images/0011_tex_env_combine_with_constant_color.qoi Normal file
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3
Userland/Libraries/LibGL/GL/gl.h
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@ -496,8 +496,9 @@ extern "C" {
#define GL_ADD 0x0104
#define GL_ALPHA_SCALE 0x0D1C
#define GL_MODULATE 0x2100
#define GL_TEXTURE_ENV_MODE 0x2200
#define GL_DECAL 0x2101
#define GL_TEXTURE_ENV_MODE 0x2200
#define GL_TEXTURE_ENV_COLOR 0x2201
#define GL_TEXTURE_ENV 0x2300
#define GL_NEAREST 0x2600
#define GL_LINEAR 0x2601

27
Userland/Libraries/LibGL/GLAPI.json
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@ -978,18 +978,35 @@
"arguments": [
{"type": "GLenum", "name": "target"},
{"type": "GLenum", "name": "pname"},
{"name": "param", "cast_to": "GLfloat"}
{"name": "param"},
{"type": "GLenum", "expression": "@variant_gl_type@"}
],
"implementation": "tex_envv",
"variants": {
"argument_counts": [1],
"pointer_argument": "params",
"types": {
"f": {},
"fv": {"unimplemented": true},
"i": {},
"iv": {"unimplemented": true}
"fv": {},
"iv": {}
}
}
},
"TexEnvf": {
"arguments": [
{"type": "GLenum", "name": "target"},
{"type": "GLenum", "name": "pname"},
{"type": "GLfloat", "name": "x", "expression": "{@argument_name@, 0.f, 0.f, 0.f}"}
],
"implementation": "tex_env"
},
"TexEnvi": {
"arguments": [
{"type": "GLenum", "name": "target"},
{"type": "GLenum", "name": "pname"},
{"type": "GLint", "name": "x", "expression": "{static_cast<float>(@argument_name@), 0.f, 0.f, 0.f}"}
],
"implementation": "tex_env"
},
"TexGen": {
"arguments": [
{"type": "GLenum", "name": "coord"},

4
Userland/Libraries/LibGL/GLContext.h
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@ -159,7 +159,8 @@ public:
void gl_tex_parameterfv(GLenum target, GLenum pname, GLfloat const* params);
void gl_tex_coord(GLfloat s, GLfloat t, GLfloat r, GLfloat q);
void gl_multi_tex_coord(GLenum target, GLfloat s, GLfloat t, GLfloat r, GLfloat q);
void gl_tex_env(GLenum target, GLenum pname, GLfloat param);
void gl_tex_env(GLenum target, GLenum pname, FloatVector4 params);
void gl_tex_envv(GLenum target, GLenum pname, void const* params, GLenum type);
void gl_bind_texture(GLenum target, GLuint texture);
GLboolean gl_is_texture(GLuint texture);
void gl_active_texture(GLenum texture);
@ -487,6 +488,7 @@ private:
decltype(&GLContext::gl_bitmap),
decltype(&GLContext::gl_copy_tex_image_2d),
decltype(&GLContext::gl_rect),
decltype(&GLContext::gl_tex_env),
decltype(&GLContext::gl_tex_gen),
decltype(&GLContext::gl_tex_gen_floatv),
decltype(&GLContext::gl_fogf),

3
Userland/Libraries/LibGL/Tex/TextureUnit.h
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@ -29,6 +29,8 @@ public:
float alpha_scale() const { return m_alpha_scale; }
void set_alpha_source(size_t index, GLenum source) { m_alpha_source[index] = source; }
GLenum alpha_source(size_t index) const { return m_alpha_source[index]; }
void set_color(FloatVector4 color) { m_color = color; }
FloatVector4 color() const { return m_color; }
void set_env_mode(GLenum mode) { m_env_mode = mode; }
GLenum env_mode() const { return m_env_mode; }
void set_level_of_detail_bias(float bias) { m_level_of_detail_bias = bias; }
@ -59,6 +61,7 @@ private:
Array<GLenum, 3> m_alpha_operand { GL_SRC_ALPHA, GL_SRC_ALPHA, GL_SRC_ALPHA };
float m_alpha_scale { 1.f };
Array<GLenum, 3> m_alpha_source { GL_TEXTURE, GL_PREVIOUS, GL_CONSTANT };
FloatVector4 m_color { 0.f, 0.f, 0.f, 0.f };
GLenum m_env_mode { GL_MODULATE };
float m_level_of_detail_bias { 0.f };
GLenum m_rgb_combinator { GL_MODULATE };

31
Userland/Libraries/LibGL/Texture.cpp
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@ -305,14 +305,15 @@ void GLContext::gl_tex_coord(GLfloat s, GLfloat t, GLfloat r, GLfloat q)
m_current_vertex_tex_coord[0] = { s, t, r, q };
}
void GLContext::gl_tex_env(GLenum target, GLenum pname, GLfloat param)
void GLContext::gl_tex_env(GLenum target, GLenum pname, FloatVector4 params)
{
APPEND_TO_CALL_LIST_AND_RETURN_IF_NEEDED(gl_tex_env, target, pname, param);
APPEND_TO_CALL_LIST_AND_RETURN_IF_NEEDED(gl_tex_env, target, pname, params);
RETURN_WITH_ERROR_IF(m_in_draw_state, GL_INVALID_OPERATION);
RETURN_WITH_ERROR_IF(target != GL_TEXTURE_ENV && target != GL_TEXTURE_FILTER_CONTROL, GL_INVALID_ENUM);
RETURN_WITH_ERROR_IF(target == GL_TEXTURE_FILTER_CONTROL && pname != GL_TEXTURE_LOD_BIAS, GL_INVALID_ENUM);
auto const param = params[0];
switch (target) {
case GL_TEXTURE_ENV:
switch (pname) {
@ -422,6 +423,9 @@ void GLContext::gl_tex_env(GLenum target, GLenum pname, GLfloat param)
}
break;
}
case GL_TEXTURE_ENV_COLOR:
m_active_texture_unit->set_color(params);
break;
case GL_TEXTURE_ENV_MODE: {
auto param_enum = static_cast<GLenum>(param);
switch (param_enum) {
@ -458,6 +462,28 @@ void GLContext::gl_tex_env(GLenum target, GLenum pname, GLfloat param)
m_sampler_config_is_dirty = true;
}
void GLContext::gl_tex_envv(GLenum target, GLenum pname, void const* params, GLenum type)
{
VERIFY(type == GL_FLOAT || type == GL_INT);
auto parameters_to_vector = [&]<typename T>(T const* params) -> FloatVector4 {
auto parameters = (target == GL_TEXTURE_ENV && pname == GL_TEXTURE_ENV_COLOR)
? Vector4<T> { params[0], params[1], params[2], params[3] }
: Vector4<T> { params[0], 0, 0, 0 };
return parameters.template to_type<float>();
};
auto tex_env_parameters = (type == GL_FLOAT)
? parameters_to_vector(reinterpret_cast<GLfloat const*>(params))
: parameters_to_vector(reinterpret_cast<GLint const*>(params));
// Normalize integers to -1..1
if (target == GL_TEXTURE_ENV && pname == GL_TEXTURE_ENV_COLOR && type == GL_INT)
tex_env_parameters = (tex_env_parameters + 2147483648.f) / 2147483647.5f - 1.f;
gl_tex_env(target, pname, tex_env_parameters);
}
void GLContext::gl_tex_gen(GLenum coord, GLenum pname, GLint param)
{
APPEND_TO_CALL_LIST_AND_RETURN_IF_NEEDED(gl_tex_gen, coord, pname, param);
@ -822,6 +848,7 @@ void GLContext::sync_device_sampler_config()
}
auto& fixed_function_env = config.fixed_function_texture_environment;
fixed_function_env.color = texture_unit.color();
auto get_env_mode = [](GLenum mode) {
switch (mode) {

1
Userland/Libraries/LibGPU/SamplerConfig.h
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@ -73,7 +73,6 @@ struct FixedFunctionTextureEnvironment final {
float alpha_scale { 1.f };
Array<TextureSource, 3> alpha_source { TextureSource::Texture, TextureSource::Previous, TextureSource::Constant };
u8 alpha_source_texture_stage { 0 };
// FIXME: color is never actually updated
FloatVector4 color { 0.f, 0.f, 0.f, 0.f };
TextureEnvMode env_mode { TextureEnvMode::Modulate };
TextureCombinator rgb_combinator { TextureCombinator::Modulate };