diff options
Diffstat (limited to 'src/imgui_impl_sdl_gl3.cpp')
| -rw-r--r-- | src/imgui_impl_sdl_gl3.cpp | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/src/imgui_impl_sdl_gl3.cpp b/src/imgui_impl_sdl_gl3.cpp index 63d7033..9833b12 100644 --- a/src/imgui_impl_sdl_gl3.cpp +++ b/src/imgui_impl_sdl_gl3.cpp @@ -25,8 +25,8 @@ static int g_AttribLocationPosition = 0, g_AttribLocationUV = 0, g_Attr static unsigned int g_VboHandle = 0, g_VaoHandle = 0, g_ElementsHandle = 0; // This is the main rendering function that you have to implement and provide to ImGui (via setting up 'RenderDrawListsFn' in the ImGuiIO structure) -// If text or lines are blurry when integrating ImGui in your engine: -// - in your Render function, try translating your projection matrix by (0.5f,0.5f) or (0.375f,0.375f) +// Note that this implementation is little overcomplicated because we are saving/setting up/restoring every OpenGL state explicitly, in order to be able to run within any OpenGL engine that doesn't do so. +// If text or lines are blurry when integrating ImGui in your engine: in your Render function, try translating your projection matrix by (0.5f,0.5f) or (0.375f,0.375f) void ImGui_ImplSdlGL3_RenderDrawLists(ImDrawData* draw_data) { // Avoid rendering when minimized, scale coordinates for retina displays (screen coordinates != framebuffer coordinates) @@ -42,9 +42,11 @@ void ImGui_ImplSdlGL3_RenderDrawLists(ImDrawData* draw_data) glActiveTexture(GL_TEXTURE0); GLint last_program; glGetIntegerv(GL_CURRENT_PROGRAM, &last_program); GLint last_texture; glGetIntegerv(GL_TEXTURE_BINDING_2D, &last_texture); + GLint last_sampler; glGetIntegerv(GL_SAMPLER_BINDING, &last_sampler); GLint last_array_buffer; glGetIntegerv(GL_ARRAY_BUFFER_BINDING, &last_array_buffer); GLint last_element_array_buffer; glGetIntegerv(GL_ELEMENT_ARRAY_BUFFER_BINDING, &last_element_array_buffer); GLint last_vertex_array; glGetIntegerv(GL_VERTEX_ARRAY_BINDING, &last_vertex_array); + GLint last_polygon_mode[2]; glGetIntegerv(GL_POLYGON_MODE, last_polygon_mode); GLint last_viewport[4]; glGetIntegerv(GL_VIEWPORT, last_viewport); GLint last_scissor_box[4]; glGetIntegerv(GL_SCISSOR_BOX, last_scissor_box); GLenum last_blend_src_rgb; glGetIntegerv(GL_BLEND_SRC_RGB, (GLint*)&last_blend_src_rgb); @@ -58,13 +60,14 @@ void ImGui_ImplSdlGL3_RenderDrawLists(ImDrawData* draw_data) GLboolean last_enable_depth_test = glIsEnabled(GL_DEPTH_TEST); GLboolean last_enable_scissor_test = glIsEnabled(GL_SCISSOR_TEST); - // Setup render state: alpha-blending enabled, no face culling, no depth testing, scissor enabled + // Setup render state: alpha-blending enabled, no face culling, no depth testing, scissor enabled, polygon fill glEnable(GL_BLEND); glBlendEquation(GL_FUNC_ADD); glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA); glDisable(GL_CULL_FACE); glDisable(GL_DEPTH_TEST); glEnable(GL_SCISSOR_TEST); + glPolygonMode(GL_FRONT_AND_BACK, GL_FILL); // Setup viewport, orthographic projection matrix glViewport(0, 0, (GLsizei)fb_width, (GLsizei)fb_height); @@ -79,6 +82,7 @@ void ImGui_ImplSdlGL3_RenderDrawLists(ImDrawData* draw_data) glUniform1i(g_AttribLocationTex, 0); glUniformMatrix4fv(g_AttribLocationProjMtx, 1, GL_FALSE, &ortho_projection[0][0]); glBindVertexArray(g_VaoHandle); + glBindSampler(0, 0); // Rely on combined texture/sampler state. for (int n = 0; n < draw_data->CmdListsCount; n++) { @@ -111,6 +115,7 @@ void ImGui_ImplSdlGL3_RenderDrawLists(ImDrawData* draw_data) // Restore modified GL state glUseProgram(last_program); glBindTexture(GL_TEXTURE_2D, last_texture); + glBindSampler(0, last_sampler); glActiveTexture(last_active_texture); glBindVertexArray(last_vertex_array); glBindBuffer(GL_ARRAY_BUFFER, last_array_buffer); @@ -121,6 +126,7 @@ void ImGui_ImplSdlGL3_RenderDrawLists(ImDrawData* draw_data) if (last_enable_cull_face) glEnable(GL_CULL_FACE); else glDisable(GL_CULL_FACE); if (last_enable_depth_test) glEnable(GL_DEPTH_TEST); else glDisable(GL_DEPTH_TEST); if (last_enable_scissor_test) glEnable(GL_SCISSOR_TEST); else glDisable(GL_SCISSOR_TEST); + glPolygonMode(GL_FRONT_AND_BACK, last_polygon_mode[0]); glViewport(last_viewport[0], last_viewport[1], (GLsizei)last_viewport[2], (GLsizei)last_viewport[3]); glScissor(last_scissor_box[0], last_scissor_box[1], (GLsizei)last_scissor_box[2], (GLsizei)last_scissor_box[3]); } |