TGA dumps work, courtesy of @bunnei

src/citra/citra.cpp

@@ -24,7 +24,7 @@ int __cdecl main(int argc, char **argv) {
 
 	System::Init(emu_window);
 
-    std::string boot_filename = "homebrew.elf";
+    std::string boot_filename = "/Users/gandrade-air/Downloads/homebrew/yeti3DS-master.elf";
     std::string error_str;
     
     bool res = Loader::LoadFile(boot_filename, &error_str);

src/video_core/renderer_opengl/renderer_opengl.cpp

@@ -6,6 +6,7 @@
 
 #include "video_core/video_core.h"
 #include "video_core/renderer_opengl/renderer_opengl.h"
+#include "video_core/utils.h"
 
 #include "core/mem_map.h"
 
@@ -49,6 +50,7 @@ void RendererOpenGL::SwapBuffers() {
 
     // Switch back to EFB and clear
     glBindFramebuffer(GL_DRAW_FRAMEBUFFER, m_fbo[kFramebuffer_EFB]);
+	VideoCore::DumpTGA("dump.tga", 400, 240, m_xfb_top_flipped);
 }
 
 /**

src/video_core/utils.cpp

@@ -32,9 +32,9 @@ void DumpTGA(std::string filename, int width, int height, u8* raw_data) {
 		fwrite(&hdr, sizeof(TGAHeader), 1, fout);
 		for (int i = 0; i < height; i++) {
 			for (int j = 0; j < width; j++) {
-            r = raw_data[(4 * (i * width)) + (4 * j) + 0];
-            g = raw_data[(4 * (i * width)) + (4 * j) + 1];
-            b = raw_data[(4 * (i * width)) + (4 * j) + 2];
+				b = raw_data[(3 * (i * width)) + (3 * j) + 0];
+				g = raw_data[(3 * (i * width)) + (3 * j) + 1];
+				r = raw_data[(3 * (i * width)) + (3 * j) + 2];
 				putc(b, fout);
 				putc(g, fout);
 				putc(r, fout);