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https://github.com/fergalmoran/ladybird.git
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5e9d99474d
Images are stored on the device side. Texture2D and MipMap are now only used to store imformation about the texture and reference to the device image.
97 lines
3.5 KiB
C++
97 lines
3.5 KiB
C++
/*
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* Copyright (c) 2021, Jesse Buhagiar <jooster669@gmail.com>
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* Copyright (c) 2021, Stephan Unverwerth <s.unverwerth@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <LibGL/GL/gl.h>
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#include <LibGL/Tex/Texture2D.h>
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namespace GL {
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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, GLsizei pixels_per_row, u8 byte_alignment)
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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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// checks here to see if we support them; the program will simply fail to compile..
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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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// No pixel data was supplied leave the texture memory uninitialized.
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if (pixels == nullptr)
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return;
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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, byte_alignment);
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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, GLsizei pixels_per_row, u8 byte_alignment)
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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 and GL_UNSIGNED_SHORT_5_6_5 pixel data
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VERIFY(type == GL_UNSIGNED_BYTE || type == GL_UNSIGNED_SHORT_5_6_5);
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VERIFY(xoffset >= 0 && yoffset >= 0 && xoffset + width <= mip.width() && yoffset + height <= mip.height());
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VERIFY(pixels_per_row == 0 || pixels_per_row >= xoffset + width);
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// FIXME: We currently depend on the first glTexImage2D call to attach an image to mipmap level 0, which initializes the GPU image
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// Ideally we would create separate GPU images for each level and merge them into a final image
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// once used for rendering for the first time.
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if (device_image().is_null())
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return;
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u8 pixel_size_bytes;
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switch (type) {
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case GL_UNSIGNED_BYTE:
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pixel_size_bytes = (format == GL_RGBA || format == GL_BGRA) ? 4 : 3;
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break;
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case GL_UNSIGNED_SHORT_5_6_5:
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pixel_size_bytes = sizeof(u16);
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break;
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default:
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VERIFY_NOT_REACHED();
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}
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// Calculate row offset at end to fit alignment
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int const physical_width = pixels_per_row > 0 ? pixels_per_row : width;
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size_t const physical_width_bytes = physical_width * pixel_size_bytes;
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SoftGPU::ImageDataLayout layout;
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layout.column_stride = pixel_size_bytes;
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layout.row_stride = physical_width_bytes + (byte_alignment - physical_width_bytes % byte_alignment) % byte_alignment;
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layout.depth_stride = 0;
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if (type == GL_UNSIGNED_SHORT_5_6_5) {
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layout.format = SoftGPU::ImageFormat::RGB565;
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} else if (type == GL_UNSIGNED_BYTE) {
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if (format == GL_RGB)
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layout.format = SoftGPU::ImageFormat::RGB888;
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else if (format == GL_BGR)
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layout.format = SoftGPU::ImageFormat::BGR888;
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else if (format == GL_RGBA)
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layout.format = SoftGPU::ImageFormat::RGBA8888;
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else if (format == GL_BGRA)
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layout.format = SoftGPU::ImageFormat::BGRA8888;
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}
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Vector3<unsigned> offset {
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static_cast<unsigned>(xoffset),
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static_cast<unsigned>(yoffset),
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0
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};
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Vector3<unsigned> size {
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static_cast<unsigned>(width),
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static_cast<unsigned>(height),
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1
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};
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device_image()->write_texels(0, lod, offset, size, pixels, layout);
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}
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}
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