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LibGL: Implement glPixelStorei

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This sets the length of a row for the image to be transferred. This
value is measured in pixels. When a rectangle with a width less than
this value is transferred the remaining pixels of this row are skipped.
This commit is contained in:
Stephan Unverwerth 2021-08-21 14:49:27 +02:00 • committed by Andreas Kling
parent eb368a5000
commit 19a08ff187
Notes: sideshowbarker 2024-07-18 05:16:25 +09:00
7 changed files with 79 additions and 31 deletions
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82
Userland/Libraries/LibGL/Tex/Texture2D.cpp
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@ -12,7 +12,7 @@
namespace GL {
void Texture2D::upload_texture_data(GLenum, GLint lod, GLint internal_format, GLsizei width, GLsizei height, GLint, GLenum format, GLenum, const GLvoid* pixels)
void Texture2D::upload_texture_data(GLenum, GLint lod, GLint internal_format, GLsizei width, GLsizei height, GLint, GLenum format, GLenum, const GLvoid* pixels, size_t pixels_per_row)
{
// NOTE: Some target, format, and internal formats are currently unsupported.
// Considering we control this library, and `gl.h` itself, we don't need to add any
@ -34,44 +34,68 @@ void Texture2D::upload_texture_data(GLenum, GLint lod, GLint internal_format, GL
mip.pixel_data().clear();
if (format == GL_RGBA) {
for (auto i = 0; i < width * height * 4; i += 4) {
u32 r = pixel_byte_array[i + 0];
u32 g = pixel_byte_array[i + 1];
u32 b = pixel_byte_array[i + 2];
u32 a = pixel_byte_array[i + 3];
for (auto y = 0; y < height; y++) {
for (auto x = 0; x < width; x++) {
u32 r = *pixel_byte_array++;
u32 g = *pixel_byte_array++;
u32 b = *pixel_byte_array++;
u32 a = *pixel_byte_array++;
u32 pixel = ((a << 24) | (r << 16) | (g << 8) | b);
mip.pixel_data().append(pixel);
u32 pixel = ((a << 24) | (r << 16) | (g << 8) | b);
mip.pixel_data().append(pixel);
}
if (pixels_per_row > 0) {
pixel_byte_array += (pixels_per_row - width) * 4;
}
}
} else if (format == GL_BGRA) {
for (auto i = 0; i < width * height * 4; i += 4) {
u32 b = pixel_byte_array[i + 0];
u32 g = pixel_byte_array[i + 1];
u32 r = pixel_byte_array[i + 2];
u32 a = pixel_byte_array[i + 3];
for (auto y = 0; y < height; y++) {
for (auto x = 0; x < width; x++) {
u32 b = *pixel_byte_array++;
u32 g = *pixel_byte_array++;
u32 r = *pixel_byte_array++;
u32 a = *pixel_byte_array++;
u32 pixel = ((a << 24) | (r << 16) | (g << 8) | b);
mip.pixel_data().append(pixel);
u32 pixel = ((a << 24) | (r << 16) | (g << 8) | b);
mip.pixel_data().append(pixel);
}
if (pixels_per_row > 0) {
pixel_byte_array += (pixels_per_row - width) * 4;
}
}
} else if (format == GL_BGR) {
for (auto i = 0; i < width * height * 3; i += 3) {
u32 b = pixel_byte_array[i + 0];
u32 g = pixel_byte_array[i + 1];
u32 r = pixel_byte_array[i + 2];
u32 a = 255;
for (auto y = 0; y < height; y++) {
for (auto x = 0; x < width; x++) {
u32 b = *pixel_byte_array++;
u32 g = *pixel_byte_array++;
u32 r = *pixel_byte_array++;
u32 a = 255;
u32 pixel = ((a << 24) | (r << 16) | (g << 8) | b);
mip.pixel_data().append(pixel);
u32 pixel = ((a << 24) | (r << 16) | (g << 8) | b);
mip.pixel_data().append(pixel);
}
if (pixels_per_row > 0) {
pixel_byte_array += (pixels_per_row - width) * 3;
}
}
} else if (format == GL_RGB) {
for (auto i = 0; i < width * height * 3; i += 3) {
u32 r = pixel_byte_array[i + 0];
u32 g = pixel_byte_array[i + 1];
u32 b = pixel_byte_array[i + 2];
u32 a = 255;
for (auto y = 0; y < height; y++) {
for (auto x = 0; x < width; x++) {
u32 r = *pixel_byte_array++;
u32 g = *pixel_byte_array++;
u32 b = *pixel_byte_array++;
u32 a = 255;
u32 pixel = ((a << 24) | (r << 16) | (g << 8) | b);
mip.pixel_data().append(pixel);
u32 pixel = ((a << 24) | (r << 16) | (g << 8) | b);
mip.pixel_data().append(pixel);
}
if (pixels_per_row > 0) {
pixel_byte_array += (pixels_per_row - width) * 3;
}
}
} else {
VERIFY_NOT_REACHED();