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LibGL: Implement state for all pixel store parameters

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This implements the state and context parameters for all packing and
unpacking parameters accepted by `glPixelStore*`.
This commit is contained in:
Jelle Raaijmakers 2022-10-16 20:26:16 +02:00 • committed by Linus Groh
parent e2b151812e
commit fe5419da0f
3 changed files with 75 additions and 44 deletions
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56
Userland/Libraries/LibGL/ContextParameter.cpp
View file

@ -89,19 +89,21 @@ Optional<ContextParameter> GLContext::get_context_parameter(GLenum name)
case GL_NORMALIZE:
return ContextParameter { .type = GL_BOOL, .is_capability = true, .value = { .boolean_value = m_normalize } };
case GL_PACK_ALIGNMENT:
return ContextParameter { .type = GL_INT, .value = { .integer_value = m_pack_alignment } };
return ContextParameter { .type = GL_INT, .value = { .integer_value = m_packing_parameters.pack_alignment } };
case GL_PACK_IMAGE_HEIGHT:
return ContextParameter { .type = GL_BOOL, .value = { .integer_value = 0 } };
return ContextParameter { .type = GL_INT, .value = { .integer_value = m_packing_parameters.image_height } };
case GL_PACK_LSB_FIRST:
return ContextParameter { .type = GL_BOOL, .value = { .boolean_value = false } };
return ContextParameter { .type = GL_BOOL, .value = { .boolean_value = m_packing_parameters.least_significant_bit_first } };
case GL_PACK_ROW_LENGTH:
return ContextParameter { .type = GL_INT, .value = { .integer_value = 0 } };
return ContextParameter { .type = GL_INT, .value = { .integer_value = m_packing_parameters.row_length } };
case GL_PACK_SKIP_IMAGES:
return ContextParameter { .type = GL_INT, .value = { .integer_value = m_packing_parameters.skip_images } };
case GL_PACK_SKIP_PIXELS:
return ContextParameter { .type = GL_INT, .value = { .integer_value = 0 } };
return ContextParameter { .type = GL_INT, .value = { .integer_value = m_packing_parameters.skip_pixels } };
case GL_PACK_SKIP_ROWS:
return ContextParameter { .type = GL_INT, .value = { .integer_value = 0 } };
return ContextParameter { .type = GL_INT, .value = { .integer_value = m_packing_parameters.skip_rows } };
case GL_PACK_SWAP_BYTES:
return ContextParameter { .type = GL_BOOL, .value = { .boolean_value = false } };
return ContextParameter { .type = GL_BOOL, .value = { .boolean_value = m_packing_parameters.swap_bytes } };
case GL_POINT_SMOOTH:
return ContextParameter { .type = GL_BOOL, .is_capability = true, .value = { .boolean_value = m_point_smooth } };
case GL_POINT_SIZE:
@ -154,19 +156,21 @@ Optional<ContextParameter> GLContext::get_context_parameter(GLenum name)
return ContextParameter { .type = GL_BOOL, .is_capability = true, .value = { .boolean_value = generation_enabled } };
}
case GL_UNPACK_ALIGNMENT:
return ContextParameter { .type = GL_INT, .value = { .integer_value = m_unpack_alignment } };
return ContextParameter { .type = GL_INT, .value = { .integer_value = m_unpacking_parameters.pack_alignment } };
case GL_UNPACK_IMAGE_HEIGHT:
return ContextParameter { .type = GL_BOOL, .value = { .integer_value = 0 } };
return ContextParameter { .type = GL_INT, .value = { .integer_value = m_unpacking_parameters.image_height } };
case GL_UNPACK_LSB_FIRST:
return ContextParameter { .type = GL_BOOL, .value = { .boolean_value = false } };
return ContextParameter { .type = GL_BOOL, .value = { .boolean_value = m_unpacking_parameters.least_significant_bit_first } };
case GL_UNPACK_ROW_LENGTH:
return ContextParameter { .type = GL_INT, .value = { .integer_value = m_unpack_row_length } };
return ContextParameter { .type = GL_INT, .value = { .integer_value = m_unpacking_parameters.row_length } };
case GL_UNPACK_SKIP_IMAGES:
return ContextParameter { .type = GL_INT, .value = { .integer_value = m_unpacking_parameters.skip_images } };
case GL_UNPACK_SKIP_PIXELS:
return ContextParameter { .type = GL_INT, .value = { .integer_value = 0 } };
return ContextParameter { .type = GL_INT, .value = { .integer_value = m_unpacking_parameters.skip_pixels } };
case GL_UNPACK_SKIP_ROWS:
return ContextParameter { .type = GL_INT, .value = { .integer_value = 0 } };
return ContextParameter { .type = GL_INT, .value = { .integer_value = m_unpacking_parameters.skip_rows } };
case GL_UNPACK_SWAP_BYTES:
return ContextParameter { .type = GL_BOOL, .value = { .boolean_value = false } };
return ContextParameter { .type = GL_BOOL, .value = { .boolean_value = m_unpacking_parameters.swap_bytes } };
case GL_VIEWPORT:
return ContextParameter {
.type = GL_INT,
@ -616,25 +620,13 @@ GLboolean GLContext::gl_is_enabled(GLenum capability)
GPU::PackingSpecification GLContext::get_packing_specification(PackingType packing_type)
{
// Make use of the fact that the GL_PACK_* and GL_UNPACK_* enum constants are in the exact same order
auto const offset = (packing_type == PackingType::Unpack) ? 0 : (GL_PACK_SWAP_BYTES - GL_UNPACK_SWAP_BYTES);
auto get_packing_value = [&](GLenum packing_parameter) -> GLint {
GLint value;
gl_get_integerv(packing_parameter + offset, &value);
return value;
};
// FIXME: add support for GL_UNPACK_SKIP_PIXELS, GL_UNPACK_SKIP_ROWS and GL_UNPACK_LSB_FIRST
GLint byte_alignment { get_packing_value(GL_UNPACK_ALIGNMENT) };
GLint swap_bytes { get_packing_value(GL_UNPACK_SWAP_BYTES) };
GLint depth_stride { get_packing_value(GL_UNPACK_IMAGE_HEIGHT) };
GLint row_stride { get_packing_value(GL_UNPACK_ROW_LENGTH) };
// FIXME: add support for .least_significant_bit_first, .skip_images, .skip_pixels and .skip_rows
auto const& pixel_parameters = (packing_type == PackingType::Pack) ? m_packing_parameters : m_unpacking_parameters;
return {
.depth_stride = static_cast<u32>(depth_stride),
.row_stride = static_cast<u32>(row_stride),
.byte_alignment = static_cast<u8>(byte_alignment),
.component_bytes_order = swap_bytes == GL_TRUE ? GPU::ComponentBytesOrder::Reversed : GPU::ComponentBytesOrder::Normal,
.depth_stride = static_cast<u32>(pixel_parameters.image_height),
.row_stride = static_cast<u32>(pixel_parameters.row_length),
.byte_alignment = pixel_parameters.pack_alignment,
.component_bytes_order = pixel_parameters.swap_bytes ? GPU::ComponentBytesOrder::Reversed : GPU::ComponentBytesOrder::Normal,
};
}

48
Userland/Libraries/LibGL/GLContext.cpp
View file

@ -773,19 +773,49 @@ void GLContext::gl_fogi(GLenum pname, GLint param)
void GLContext::gl_pixel_storei(GLenum pname, GLint param)
{
// FIXME: Implement missing parameters
auto const is_packing_parameter = (pname >= GL_PACK_SWAP_BYTES && pname <= GL_PACK_ALIGNMENT)
|| pname == GL_PACK_SKIP_IMAGES
|| pname == GL_PACK_IMAGE_HEIGHT;
auto& pixel_parameters = is_packing_parameter ? m_packing_parameters : m_unpacking_parameters;
switch (pname) {
case GL_PACK_ALIGNMENT:
RETURN_WITH_ERROR_IF(param != 1 && param != 2 && param != 4 && param != 8, GL_INVALID_VALUE);
m_pack_alignment = param;
break;
case GL_UNPACK_ROW_LENGTH:
RETURN_WITH_ERROR_IF(param < 0, GL_INVALID_VALUE);
m_unpack_row_length = static_cast<size_t>(param);
break;
case GL_UNPACK_ALIGNMENT:
RETURN_WITH_ERROR_IF(param != 1 && param != 2 && param != 4 && param != 8, GL_INVALID_VALUE);
m_unpack_alignment = param;
pixel_parameters.pack_alignment = param;
break;
case GL_PACK_IMAGE_HEIGHT:
case GL_UNPACK_IMAGE_HEIGHT:
RETURN_WITH_ERROR_IF(param < 0, GL_INVALID_VALUE);
pixel_parameters.image_height = param;
break;
case GL_PACK_LSB_FIRST:
case GL_UNPACK_LSB_FIRST:
pixel_parameters.least_significant_bit_first = (param != 0);
break;
case GL_PACK_ROW_LENGTH:
case GL_UNPACK_ROW_LENGTH:
RETURN_WITH_ERROR_IF(param < 0, GL_INVALID_VALUE);
pixel_parameters.row_length = param;
break;
case GL_PACK_SKIP_IMAGES:
case GL_UNPACK_SKIP_IMAGES:
RETURN_WITH_ERROR_IF(param < 0, GL_INVALID_VALUE);
pixel_parameters.skip_images = param;
break;
case GL_PACK_SKIP_PIXELS:
case GL_UNPACK_SKIP_PIXELS:
RETURN_WITH_ERROR_IF(param < 0, GL_INVALID_VALUE);
pixel_parameters.skip_pixels = param;
break;
case GL_PACK_SKIP_ROWS:
case GL_UNPACK_SKIP_ROWS:
RETURN_WITH_ERROR_IF(param < 0, GL_INVALID_VALUE);
pixel_parameters.skip_rows = param;
break;
case GL_PACK_SWAP_BYTES:
case GL_UNPACK_SWAP_BYTES:
pixel_parameters.swap_bytes = (param != 0);
break;
default:
RETURN_WITH_ERROR_IF(true, GL_INVALID_ENUM);

15
Userland/Libraries/LibGL/GLContext.h
View file

@ -510,9 +510,18 @@ private:
Vector<VertexAttribPointer> m_client_tex_coord_pointer;
VertexAttribPointer m_client_normal_pointer;
u8 m_pack_alignment { 4 };
GLsizei m_unpack_row_length { 0 };
u8 m_unpack_alignment { 4 };
struct PixelParameters {
i32 image_height { 0 };
bool least_significant_bit_first { false };
u8 pack_alignment { 4 };
i32 row_length { 0 };
i32 skip_images { 0 };
i32 skip_pixels { 0 };
i32 skip_rows { 0 };
bool swap_bytes { false };
};
PixelParameters m_packing_parameters;
PixelParameters m_unpacking_parameters;
// Point drawing configuration
bool m_point_smooth { false };