From e040afd35dec99857e52accca9ef7b6c15dbbdb5 Mon Sep 17 00:00:00 2001
From: Francisco Javier Trujillo Mata
Date: Sat, 23 Nov 2019 17:34:35 +0100
Subject: Make PSP version to render the image it-self instead of using
 RetroArch

---
 libretro.c | 43 +++++++++++++++++++++++++++++++++++++++++--
 1 file changed, 41 insertions(+), 2 deletions(-)

(limited to 'libretro.c')

diff --git a/libretro.c b/libretro.c
index f35599b..a7255e7 100644
--- a/libretro.c
+++ b/libretro.c
@@ -93,6 +93,46 @@ static inline void deinit_context_switch(void)
    co_delete(cpu_thread);
 }
 
+static uint32_t next_pow2(uint32_t v)
+{
+   v--;
+   v |= v >> 1;
+   v |= v >> 2;
+   v |= v >> 4;
+   v |= v >> 8;
+   v |= v >> 16;
+   v++;
+   return v;
+}
+
+static void video_run(void) {
+#if defined(PSP)
+   static unsigned int __attribute__((aligned(16))) d_list[32];
+   void* texture_vram_p = NULL;
+   int texture_size = (GBA_SCREEN_WIDTH*GBA_SCREEN_HEIGHT*2);
+   
+   texture_vram_p = (void*) (0x44200000 - texture_size); /* max VRAM address - frame size */
+
+   sceKernelDcacheWritebackRange(gba_screen_pixels, texture_size);
+
+   sceGuStart(GU_DIRECT, d_list);
+   sceGuTexMode(GU_PSM_5650, 0, 0, GU_FALSE);
+   sceGuCopyImage(GU_PSM_5650, 0, 0, GBA_SCREEN_WIDTH, GBA_SCREEN_HEIGHT, GBA_SCREEN_WIDTH,
+               gba_screen_pixels, 0, 0, GBA_SCREEN_WIDTH, texture_vram_p);
+	sceGuTexImage(0, next_pow2(GBA_SCREEN_WIDTH), next_pow2(GBA_SCREEN_HEIGHT), GBA_SCREEN_WIDTH, texture_vram_p);
+	sceGuTexFunc(GU_TFX_REPLACE, GU_TCC_RGB);
+   sceGuDisable(GU_BLEND);
+
+   sceGuFinish();
+
+   video_cb(texture_vram_p, GBA_SCREEN_WIDTH, GBA_SCREEN_HEIGHT,
+            GBA_SCREEN_PITCH * 2);
+#else 
+   video_cb(gba_screen_pixels, GBA_SCREEN_WIDTH, GBA_SCREEN_HEIGHT,
+            GBA_SCREEN_PITCH * 2);
+#endif
+}
+
 #ifdef PERF_TEST
 
 extern struct retro_perf_callback perf_cb;
@@ -585,8 +625,7 @@ void retro_run(void)
 
    render_audio();
 
-   video_cb(gba_screen_pixels, GBA_SCREEN_WIDTH, GBA_SCREEN_HEIGHT,
-            GBA_SCREEN_PITCH * 2);
+   video_run();
 
    if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE_UPDATE, &updated) && updated)
       check_variables(0);
-- 
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