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PICA: Scissor fixes and cleanups
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@ -128,22 +128,14 @@ struct Regs {
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BitField<0, 2, ScissorMode> mode;
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union {
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BitField< 0, 16, u32> right;
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BitField<16, 16, u32> bottom;
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BitField< 0, 16, u32> x1;
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BitField<16, 16, u32> y1;
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};
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union {
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BitField< 0, 16, u32> left_minus_1;
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BitField<16, 16, u32> top_minus_1;
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BitField< 0, 16, u32> x2;
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BitField<16, 16, u32> y2;
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};
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u32 GetTop() const {
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return top_minus_1 + 1;
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}
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u32 GetLeft() const {
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return left_minus_1 + 1;
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}
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} scissor_test;
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union {
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@ -344,17 +344,18 @@ static void ProcessTriangleInternal(const Shader::OutputVertex& v0,
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u16 max_y = std::max({vtxpos[0].y, vtxpos[1].y, vtxpos[2].y});
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// Convert the scissor box coordinates to 12.4 fixed point
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u16 scissor_left = (u16)(regs.scissor_test.GetLeft() << 4);
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u16 scissor_top = (u16)(regs.scissor_test.GetTop() << 4);
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u16 scissor_right = (u16)(regs.scissor_test.right << 4);
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u16 scissor_bottom = (u16)(regs.scissor_test.bottom << 4);
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u16 scissor_x1 = (u16)( regs.scissor_test.x1 << 4);
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u16 scissor_y1 = (u16)( regs.scissor_test.y1 << 4);
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// x2,y2 have +1 added to cover the entire sub-pixel area
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u16 scissor_x2 = (u16)((regs.scissor_test.x2 + 1) << 4);
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u16 scissor_y2 = (u16)((regs.scissor_test.y2 + 1) << 4);
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if (regs.scissor_test.mode == Regs::ScissorMode::Include) {
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// Calculate the new bounds
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min_x = std::max(min_x, scissor_right);
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min_y = std::max(min_y, scissor_bottom);
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max_x = std::min(max_x, scissor_left);
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max_y = std::min(max_y, scissor_top);
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min_x = std::max(min_x, scissor_x1);
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min_y = std::max(min_y, scissor_y1);
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max_x = std::min(max_x, scissor_x2);
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max_y = std::min(max_y, scissor_y2);
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}
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min_x &= Fix12P4::IntMask();
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@ -397,10 +398,10 @@ static void ProcessTriangleInternal(const Shader::OutputVertex& v0,
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for (u16 x = min_x + 8; x < max_x; x += 0x10) {
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// Do not process the pixel if it's inside the scissor box and the scissor mode is set to Exclude
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if (regs.scissor_test.mode == Regs::ScissorMode::Exclude &&
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x >= scissor_right && x <= scissor_left &&
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y >= scissor_bottom && y <= scissor_top) {
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continue;
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if (regs.scissor_test.mode == Regs::ScissorMode::Exclude) {
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if (x >= scissor_x1 && x < scissor_x2 &&
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y >= scissor_y1 && y < scissor_y2)
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continue;
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}
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// Calculate the barycentric coordinates w0, w1 and w2
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@ -357,8 +357,8 @@ void RasterizerOpenGL::NotifyPicaRegisterChanged(u32 id) {
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case PICA_REG_INDEX(scissor_test.mode):
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shader_dirty = true;
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break;
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case PICA_REG_INDEX(scissor_test.right):
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case PICA_REG_INDEX(scissor_test.left_minus_1):
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case PICA_REG_INDEX(scissor_test.x1): // and y1
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case PICA_REG_INDEX(scissor_test.x2): // and y2
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SyncScissorTest();
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break;
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@ -1179,15 +1179,15 @@ void RasterizerOpenGL::SyncDepthTest() {
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void RasterizerOpenGL::SyncScissorTest() {
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const auto& regs = Pica::g_state.regs;
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if (uniform_block_data.data.scissor_right != regs.scissor_test.right ||
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uniform_block_data.data.scissor_bottom != regs.scissor_test.bottom ||
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uniform_block_data.data.scissor_left != regs.scissor_test.GetLeft() ||
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uniform_block_data.data.scissor_top != regs.scissor_test.GetTop()) {
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if (uniform_block_data.data.scissor_x1 != regs.scissor_test.x1 ||
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uniform_block_data.data.scissor_y1 != regs.scissor_test.y1 ||
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uniform_block_data.data.scissor_x2 != regs.scissor_test.x2 ||
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uniform_block_data.data.scissor_y2 != regs.scissor_test.y2) {
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uniform_block_data.data.scissor_right = regs.scissor_test.right;
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uniform_block_data.data.scissor_bottom = regs.scissor_test.bottom;
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uniform_block_data.data.scissor_left = regs.scissor_test.GetLeft();
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uniform_block_data.data.scissor_top = regs.scissor_test.GetTop();
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uniform_block_data.data.scissor_x1 = regs.scissor_test.x1;
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uniform_block_data.data.scissor_y1 = regs.scissor_test.y1;
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uniform_block_data.data.scissor_x2 = regs.scissor_test.x2;
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uniform_block_data.data.scissor_y2 = regs.scissor_test.y2;
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uniform_block_data.dirty = true;
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}
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}
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@ -331,10 +331,10 @@ private:
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GLint alphatest_ref;
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GLfloat depth_scale;
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GLfloat depth_offset;
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GLint scissor_right;
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GLint scissor_bottom;
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GLint scissor_left;
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GLint scissor_top;
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GLint scissor_x1;
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GLint scissor_y1;
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GLint scissor_x2;
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GLint scissor_y2;
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alignas(16) GLvec3 fog_color;
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alignas(16) GLvec3 lighting_global_ambient;
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LightSrc light_src[8];
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@ -557,10 +557,10 @@ layout (std140) uniform shader_data {
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int alphatest_ref;
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float depth_scale;
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float depth_offset;
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int scissor_right;
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int scissor_bottom;
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int scissor_left;
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int scissor_top;
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int scissor_x1;
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int scissor_y1;
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int scissor_x2;
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int scissor_y2;
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vec3 fog_color;
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vec3 lighting_global_ambient;
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LightSrc light_src[NUM_LIGHTS];
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@ -589,13 +589,14 @@ vec4 secondary_fragment_color = vec4(0.0);
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}
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// Append the scissor test
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if (state.scissor_test_mode == Regs::ScissorMode::Include || state.scissor_test_mode == Regs::ScissorMode::Exclude) {
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out += "if (scissor_left <= scissor_right || scissor_top <= scissor_bottom) discard;\n";
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if (state.scissor_test_mode != Regs::ScissorMode::Disabled) {
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out += "if (";
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// Negate the condition if we have to keep only the pixels outside the scissor box
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if (state.scissor_test_mode == Regs::ScissorMode::Include)
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out += "!";
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out += "(gl_FragCoord.x >= scissor_right && gl_FragCoord.x <= scissor_left && gl_FragCoord.y >= scissor_bottom && gl_FragCoord.y <= scissor_top)) discard;\n";
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// x2,y2 have +1 added to cover the entire pixel area
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out += "(gl_FragCoord.x >= scissor_x1 && gl_FragCoord.x < scissor_x2 + 1 && "
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"gl_FragCoord.y >= scissor_y1 && gl_FragCoord.y < scissor_y2 + 1)) discard;\n";
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}
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out += "float z_over_w = 1.0 - gl_FragCoord.z * 2.0;\n";
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