239 lines
9.1 KiB
C++
239 lines
9.1 KiB
C++
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// Copyright 2020 Citra Emulator Project
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// Licensed under GPLv2 or any later version
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// Refer to the license.txt file included.
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#include "common/assert.h"
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#include "common/scope_exit.h"
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#include "video_core/renderer_opengl/gl_format_reinterpreter.h"
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#include "video_core/renderer_opengl/gl_rasterizer_cache.h"
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#include "video_core/renderer_opengl/gl_state.h"
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#include "video_core/renderer_opengl/gl_vars.h"
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#include "video_core/renderer_opengl/texture_filters/texture_filterer.h"
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namespace OpenGL {
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using PixelFormat = SurfaceParams::PixelFormat;
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class RGBA4toRGB5A1 final : public FormatReinterpreterBase {
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public:
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RGBA4toRGB5A1() {
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constexpr std::string_view vs_source = R"(
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out vec2 dst_coord;
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uniform mediump ivec2 dst_size;
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const vec2 vertices[4] =
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vec2[4](vec2(-1.0, -1.0), vec2(1.0, -1.0), vec2(-1.0, 1.0), vec2(1.0, 1.0));
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void main() {
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gl_Position = vec4(vertices[gl_VertexID], 0.0, 1.0);
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dst_coord = (vertices[gl_VertexID] / 2.0 + 0.5) * vec2(dst_size);
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}
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)";
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constexpr std::string_view fs_source = R"(
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in mediump vec2 dst_coord;
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out lowp vec4 frag_color;
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uniform lowp sampler2D source;
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uniform mediump ivec2 dst_size;
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uniform mediump ivec2 src_size;
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uniform mediump ivec2 src_offset;
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void main() {
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mediump ivec2 tex_coord;
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if (src_size == dst_size) {
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tex_coord = ivec2(dst_coord);
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} else {
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highp int tex_index = int(dst_coord.y) * dst_size.x + int(dst_coord.x);
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mediump int y = tex_index / src_size.x;
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tex_coord = ivec2(tex_index - y * src_size.x, y);
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}
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tex_coord -= src_offset;
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lowp ivec4 rgba4 = ivec4(texelFetch(source, tex_coord, 0) * (exp2(4.0) - 1.0));
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lowp ivec3 rgb5 =
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((rgba4.rgb << ivec3(1, 2, 3)) | (rgba4.gba >> ivec3(3, 2, 1))) & 0x1F;
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frag_color = vec4(vec3(rgb5) / (exp2(5.0) - 1.0), rgba4.a & 0x01);
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}
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)";
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program.Create(vs_source.data(), fs_source.data());
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dst_size_loc = glGetUniformLocation(program.handle, "dst_size");
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src_size_loc = glGetUniformLocation(program.handle, "src_size");
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src_offset_loc = glGetUniformLocation(program.handle, "src_offset");
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vao.Create();
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}
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void Reinterpret(GLuint src_tex, const Common::Rectangle<u32>& src_rect, GLuint read_fb_handle,
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GLuint dst_tex, const Common::Rectangle<u32>& dst_rect,
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GLuint draw_fb_handle) override {
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OpenGLState prev_state = OpenGLState::GetCurState();
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SCOPE_EXIT({ prev_state.Apply(); });
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OpenGLState state;
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state.texture_units[0].texture_2d = src_tex;
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state.draw.draw_framebuffer = draw_fb_handle;
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state.draw.shader_program = program.handle;
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state.draw.vertex_array = vao.handle;
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state.viewport = {static_cast<GLint>(dst_rect.left), static_cast<GLint>(dst_rect.bottom),
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static_cast<GLsizei>(dst_rect.GetWidth()),
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static_cast<GLsizei>(dst_rect.GetHeight())};
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state.Apply();
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glFramebufferTexture2D(GL_DRAW_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, dst_tex,
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0);
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glFramebufferTexture2D(GL_DRAW_FRAMEBUFFER, GL_DEPTH_STENCIL_ATTACHMENT, GL_TEXTURE_2D, 0,
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0);
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glUniform2i(dst_size_loc, dst_rect.GetWidth(), dst_rect.GetHeight());
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glUniform2i(src_size_loc, src_rect.GetWidth(), src_rect.GetHeight());
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glUniform2i(src_offset_loc, src_rect.left, src_rect.bottom);
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glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
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}
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private:
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OGLProgram program;
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GLint dst_size_loc{-1}, src_size_loc{-1}, src_offset_loc{-1};
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OGLVertexArray vao;
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};
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class PixelBufferD24S8toABGR final : public FormatReinterpreterBase {
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public:
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PixelBufferD24S8toABGR() {
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attributeless_vao.Create();
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d24s8_abgr_buffer.Create();
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d24s8_abgr_buffer_size = 0;
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constexpr std::string_view vs_source = R"(
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const vec2 vertices[4] = vec2[4](vec2(-1.0, -1.0), vec2(1.0, -1.0),
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vec2(-1.0, 1.0), vec2(1.0, 1.0));
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void main() {
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gl_Position = vec4(vertices[gl_VertexID], 0.0, 1.0);
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}
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)";
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std::string fs_source = GLES ? fragment_shader_precision_OES : "";
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fs_source += R"(
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uniform samplerBuffer tbo;
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uniform vec2 tbo_size;
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uniform vec4 viewport;
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out vec4 color;
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void main() {
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vec2 tbo_coord = (gl_FragCoord.xy - viewport.xy) * tbo_size / viewport.zw;
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int tbo_offset = int(tbo_coord.y) * int(tbo_size.x) + int(tbo_coord.x);
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color = texelFetch(tbo, tbo_offset).rabg;
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}
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)";
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d24s8_abgr_shader.Create(vs_source.data(), fs_source.c_str());
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OpenGLState state = OpenGLState::GetCurState();
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GLuint old_program = state.draw.shader_program;
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state.draw.shader_program = d24s8_abgr_shader.handle;
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state.Apply();
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GLint tbo_u_id = glGetUniformLocation(d24s8_abgr_shader.handle, "tbo");
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ASSERT(tbo_u_id != -1);
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glUniform1i(tbo_u_id, 0);
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state.draw.shader_program = old_program;
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state.Apply();
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d24s8_abgr_tbo_size_u_id = glGetUniformLocation(d24s8_abgr_shader.handle, "tbo_size");
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ASSERT(d24s8_abgr_tbo_size_u_id != -1);
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d24s8_abgr_viewport_u_id = glGetUniformLocation(d24s8_abgr_shader.handle, "viewport");
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ASSERT(d24s8_abgr_viewport_u_id != -1);
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}
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~PixelBufferD24S8toABGR() {}
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void Reinterpret(GLuint src_tex, const Common::Rectangle<u32>& src_rect, GLuint read_fb_handle,
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GLuint dst_tex, const Common::Rectangle<u32>& dst_rect,
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GLuint draw_fb_handle) override {
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OpenGLState prev_state = OpenGLState::GetCurState();
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SCOPE_EXIT({ prev_state.Apply(); });
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OpenGLState state;
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state.draw.read_framebuffer = read_fb_handle;
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state.draw.draw_framebuffer = draw_fb_handle;
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state.Apply();
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glBindBuffer(GL_PIXEL_PACK_BUFFER, d24s8_abgr_buffer.handle);
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GLsizeiptr target_pbo_size =
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static_cast<GLsizeiptr>(src_rect.GetWidth()) * src_rect.GetHeight() * 4;
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if (target_pbo_size > d24s8_abgr_buffer_size) {
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d24s8_abgr_buffer_size = target_pbo_size * 2;
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glBufferData(GL_PIXEL_PACK_BUFFER, d24s8_abgr_buffer_size, nullptr, GL_STREAM_COPY);
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}
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glFramebufferTexture2D(GL_READ_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, 0, 0);
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glFramebufferTexture2D(GL_READ_FRAMEBUFFER, GL_DEPTH_STENCIL_ATTACHMENT, GL_TEXTURE_2D,
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src_tex, 0);
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glReadPixels(static_cast<GLint>(src_rect.left), static_cast<GLint>(src_rect.bottom),
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static_cast<GLsizei>(src_rect.GetWidth()),
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static_cast<GLsizei>(src_rect.GetHeight()), GL_DEPTH_STENCIL,
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GL_UNSIGNED_INT_24_8, 0);
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glBindBuffer(GL_PIXEL_PACK_BUFFER, 0);
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// PBO now contains src_tex in RABG format
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state.draw.shader_program = d24s8_abgr_shader.handle;
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state.draw.vertex_array = attributeless_vao.handle;
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state.viewport.x = static_cast<GLint>(dst_rect.left);
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state.viewport.y = static_cast<GLint>(dst_rect.bottom);
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state.viewport.width = static_cast<GLsizei>(dst_rect.GetWidth());
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state.viewport.height = static_cast<GLsizei>(dst_rect.GetHeight());
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state.Apply();
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OGLTexture tbo;
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tbo.Create();
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glActiveTexture(GL_TEXTURE0);
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glBindTexture(GL_TEXTURE_BUFFER, tbo.handle);
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glTexBuffer(GL_TEXTURE_BUFFER, GL_RGBA8, d24s8_abgr_buffer.handle);
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glUniform2f(d24s8_abgr_tbo_size_u_id, static_cast<GLfloat>(src_rect.GetWidth()),
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static_cast<GLfloat>(src_rect.GetHeight()));
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glUniform4f(d24s8_abgr_viewport_u_id, static_cast<GLfloat>(state.viewport.x),
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static_cast<GLfloat>(state.viewport.y),
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static_cast<GLfloat>(state.viewport.width),
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static_cast<GLfloat>(state.viewport.height));
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glFramebufferTexture2D(GL_DRAW_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, dst_tex,
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0);
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glFramebufferTexture2D(GL_DRAW_FRAMEBUFFER, GL_DEPTH_STENCIL_ATTACHMENT, GL_TEXTURE_2D, 0,
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0);
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glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
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glBindTexture(GL_TEXTURE_BUFFER, 0);
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}
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private:
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OGLVertexArray attributeless_vao;
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OGLBuffer d24s8_abgr_buffer;
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GLsizeiptr d24s8_abgr_buffer_size;
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OGLProgram d24s8_abgr_shader;
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GLint d24s8_abgr_tbo_size_u_id;
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GLint d24s8_abgr_viewport_u_id;
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};
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FormatReinterpreterOpenGL::FormatReinterpreterOpenGL() {
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reinterpreters.emplace(PixelFormatPair{PixelFormat::RGBA8, PixelFormat::D24S8},
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std::make_unique<PixelBufferD24S8toABGR>());
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reinterpreters.emplace(PixelFormatPair{PixelFormat::RGB5A1, PixelFormat::RGBA4},
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std::make_unique<RGBA4toRGB5A1>());
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}
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FormatReinterpreterOpenGL::~FormatReinterpreterOpenGL() = default;
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std::pair<FormatReinterpreterOpenGL::ReinterpreterMap::iterator,
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FormatReinterpreterOpenGL::ReinterpreterMap::iterator>
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FormatReinterpreterOpenGL::GetPossibleReinterpretations(PixelFormat dst_format) {
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return reinterpreters.equal_range(dst_format);
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}
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} // namespace OpenGL
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