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https://github.com/RGBCube/serenity
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LibGL: Implement glTexSubImage2D
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1aed453d8c
commit
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7 changed files with 63 additions and 19 deletions
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@ -12,7 +12,7 @@
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namespace GL {
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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)
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void Texture2D::upload_texture_data(GLuint lod, GLint internal_format, GLsizei width, GLsizei height, GLint, GLenum format, GLenum type, const GLvoid* pixels, size_t pixels_per_row)
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{
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// NOTE: Some target, format, and internal formats are currently unsupported.
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// Considering we control this library, and `gl.h` itself, we don't need to add any
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@ -21,28 +21,39 @@ void Texture2D::upload_texture_data(GLenum, GLint lod, GLint internal_format, GL
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auto& mip = m_mipmaps[lod];
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mip.set_width(width);
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mip.set_height(height);
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mip.pixel_data().resize(width * height);
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// No pixel data was supplied. Just allocate texture memory and leave it uninitialized.
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// No pixel data was supplied leave the texture memory uninitialized.
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if (pixels == nullptr) {
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mip.pixel_data().resize(width * height);
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return;
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}
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m_internal_format = internal_format;
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replace_sub_texture_data(lod, 0, 0, width, height, format, type, pixels, pixels_per_row);
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}
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void Texture2D::replace_sub_texture_data(GLuint lod, GLint xoffset, GLint yoffset, GLsizei width, GLsizei height, GLenum format, GLenum type, const GLvoid* pixels, size_t pixels_per_row)
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{
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auto& mip = m_mipmaps[lod];
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// FIXME: We currently only support GL_UNSIGNED_BYTE pixel data
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VERIFY(type == GL_UNSIGNED_BYTE);
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VERIFY(lod < m_mipmaps.size());
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VERIFY(xoffset >= 0 && yoffset >= 0 && xoffset + width <= mip.width() && yoffset + height <= mip.height());
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const u8* pixel_byte_array = reinterpret_cast<const u8*>(pixels);
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mip.pixel_data().clear();
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if (format == GL_RGBA) {
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for (auto y = 0; y < height; y++) {
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for (auto x = 0; x < width; x++) {
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for (auto y = yoffset; y < yoffset + height; y++) {
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for (auto x = xoffset; x < xoffset + width; x++) {
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u32 r = *pixel_byte_array++;
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u32 g = *pixel_byte_array++;
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u32 b = *pixel_byte_array++;
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u32 a = *pixel_byte_array++;
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u32 pixel = ((a << 24) | (r << 16) | (g << 8) | b);
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mip.pixel_data().append(pixel);
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mip.pixel_data()[y * mip.width() + x] = pixel;
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}
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if (pixels_per_row > 0) {
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@ -50,15 +61,15 @@ void Texture2D::upload_texture_data(GLenum, GLint lod, GLint internal_format, GL
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}
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}
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} else if (format == GL_BGRA) {
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for (auto y = 0; y < height; y++) {
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for (auto x = 0; x < width; x++) {
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for (auto y = yoffset; y < yoffset + height; y++) {
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for (auto x = xoffset; x < xoffset + width; x++) {
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u32 b = *pixel_byte_array++;
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u32 g = *pixel_byte_array++;
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u32 r = *pixel_byte_array++;
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u32 a = *pixel_byte_array++;
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u32 pixel = ((a << 24) | (r << 16) | (g << 8) | b);
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mip.pixel_data().append(pixel);
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mip.pixel_data()[y * mip.width() + x] = pixel;
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}
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if (pixels_per_row > 0) {
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@ -66,15 +77,15 @@ void Texture2D::upload_texture_data(GLenum, GLint lod, GLint internal_format, GL
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}
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}
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} else if (format == GL_BGR) {
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for (auto y = 0; y < height; y++) {
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for (auto x = 0; x < width; x++) {
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for (auto y = yoffset; y < yoffset + height; y++) {
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for (auto x = xoffset; x < xoffset + width; x++) {
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u32 b = *pixel_byte_array++;
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u32 g = *pixel_byte_array++;
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u32 r = *pixel_byte_array++;
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u32 a = 255;
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u32 pixel = ((a << 24) | (r << 16) | (g << 8) | b);
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mip.pixel_data().append(pixel);
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mip.pixel_data()[y * mip.width() + x] = pixel;
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}
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if (pixels_per_row > 0) {
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@ -82,15 +93,15 @@ void Texture2D::upload_texture_data(GLenum, GLint lod, GLint internal_format, GL
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}
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}
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} else if (format == GL_RGB) {
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for (auto y = 0; y < height; y++) {
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for (auto x = 0; x < width; x++) {
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for (auto y = yoffset; y < yoffset + height; y++) {
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for (auto x = xoffset; x < xoffset + width; x++) {
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u32 r = *pixel_byte_array++;
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u32 g = *pixel_byte_array++;
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u32 b = *pixel_byte_array++;
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u32 a = 255;
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u32 pixel = ((a << 24) | (r << 16) | (g << 8) | b);
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mip.pixel_data().append(pixel);
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mip.pixel_data()[y * mip.width() + x] = pixel;
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}
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if (pixels_per_row > 0) {
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