video_core: Implement maxwell3d draw texture method

2 files changed, 97 insertions, 0 deletions

diff --git a/src/video_core/renderer_opengl/blit_image.cpp b/src/video_core/renderer_opengl/blit_image.cpp
new file mode 100644
index 000000000..9a560a73b
--- /dev/null
+++ b/src/video_core/renderer_opengl/blit_image.cpp
@@ -0,0 +1,59 @@
+// SPDX-FileCopyrightText: Copyright 2023 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#include <algorithm>
+
+#include "video_core/host_shaders/blit_color_float_frag.h"
+#include "video_core/host_shaders/full_screen_triangle_vert.h"
+#include "video_core/renderer_opengl/blit_image.h"
+#include "video_core/renderer_opengl/gl_shader_manager.h"
+#include "video_core/renderer_opengl/gl_shader_util.h"
+
+namespace OpenGL {
+
+BlitImageHelper::BlitImageHelper(ProgramManager& program_manager_)
+    : program_manager(program_manager_),
+      full_screen_vert(CreateProgram(HostShaders::FULL_SCREEN_TRIANGLE_VERT, GL_VERTEX_SHADER)),
+      blit_color_to_color_frag(
+          CreateProgram(HostShaders::BLIT_COLOR_FLOAT_FRAG, GL_FRAGMENT_SHADER)) {}
+
+BlitImageHelper::~BlitImageHelper() = default;
+
+void BlitImageHelper::BlitColor(GLuint dst_framebuffer, GLuint src_image_view, GLuint src_sampler,
+                                const Region2D& dst_region, const Region2D& src_region,
+                                const Extent3D& src_size) {
+    glEnable(GL_CULL_FACE);
+    glDisable(GL_COLOR_LOGIC_OP);
+    glDisable(GL_DEPTH_TEST);
+    glDisable(GL_STENCIL_TEST);
+    glDisable(GL_POLYGON_OFFSET_FILL);
+    glDisable(GL_RASTERIZER_DISCARD);
+    glDisable(GL_ALPHA_TEST);
+    glDisablei(GL_BLEND, 0);
+    glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
+    glCullFace(GL_BACK);
+    glFrontFace(GL_CW);
+    glColorMaski(0, GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE);
+    glDepthRangeIndexed(0, 0.0, 0.0);
+
+    program_manager.BindPresentPrograms(full_screen_vert.handle, blit_color_to_color_frag.handle);
+    glProgramUniform2f(full_screen_vert.handle, 0,
+                       static_cast<float>(src_region.end.x - src_region.start.x) /
+                           static_cast<float>(src_size.width),
+                       static_cast<float>(src_region.end.y - src_region.start.y) /
+                           static_cast<float>(src_size.height));
+    glProgramUniform2f(full_screen_vert.handle, 1,
+                       static_cast<float>(src_region.start.x) / static_cast<float>(src_size.width),
+                       static_cast<float>(src_region.start.y) /
+                           static_cast<float>(src_size.height));
+    glViewport(std::min(dst_region.start.x, dst_region.end.x),
+               std::min(dst_region.start.y, dst_region.end.y),
+               std::abs(dst_region.end.x - dst_region.start.x),
+               std::abs(dst_region.end.y - dst_region.start.y));
+    glBindFramebuffer(GL_DRAW_FRAMEBUFFER, dst_framebuffer);
+    glBindSampler(0, src_sampler);
+    glBindTextureUnit(0, src_image_view);
+    glClear(GL_COLOR_BUFFER_BIT);
+    glDrawArrays(GL_TRIANGLES, 0, 3);
+}
+} // namespace OpenGL
diff --git a/src/video_core/renderer_opengl/blit_image.h b/src/video_core/renderer_opengl/blit_image.h
new file mode 100644
index 000000000..5a2b12d16
--- /dev/null
+++ b/src/video_core/renderer_opengl/blit_image.h
@@ -0,0 +1,38 @@
+// SPDX-FileCopyrightText: Copyright 2023 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#pragma once
+
+#include <glad/glad.h>
+
+#include "video_core/engines/fermi_2d.h"
+#include "video_core/renderer_opengl/gl_resource_manager.h"
+#include "video_core/texture_cache/types.h"
+
+namespace OpenGL {
+
+using VideoCommon::Extent3D;
+using VideoCommon::Offset2D;
+using VideoCommon::Region2D;
+
+class ProgramManager;
+class Framebuffer;
+class ImageView;
+
+class BlitImageHelper {
+public:
+    explicit BlitImageHelper(ProgramManager& program_manager);
+    ~BlitImageHelper();
+
+    void BlitColor(GLuint dst_framebuffer, GLuint src_image_view, GLuint src_sampler,
+                   const Region2D& dst_region, const Region2D& src_region,
+                   const Extent3D& src_size);
+
+private:
+    ProgramManager& program_manager;
+
+    OGLProgram full_screen_vert;
+    OGLProgram blit_color_to_color_frag;
+};
+
+} // namespace OpenGL