backup/cnc-ddraw
1
0
Fork 0
mirror of https://github.com/FunkyFr3sh/cnc-ddraw.git synced 2025-03-15 06:04:49 +01:00
Code Issues Projects Releases Activity

use 4 textures to reduce latency

Browse Source
This commit is contained in:
FunkyFr3sh 2018-08-22 21:51:38 +02:00
parent f1718cfd05
commit 084c7b113b
1 changed files with 17 additions and 13 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

30
src/render.c
View File

@ -22,6 +22,8 @@
#include "surface.h"
#include "paletteshader.h"
#define TEXTURE_COUNT 4
char OpenglVersion[128];
BOOL detect_cutscene();
@ -109,10 +111,8 @@ DWORD WINAPI render_main(void)
int tex_width =
ddraw->width <= 1024 ? 1024 : ddraw->width <= 2048 ? 2048 : ddraw->width <= 4096 ? 4096 : ddraw->width;
int tex_height =
ddraw->height <= tex_width ? tex_width : ddraw->height <= 2048 ? 2048 : ddraw->height <= 4096 ? 4096 : ddraw->height;
ddraw->height <= 512 ? 512 : ddraw->height <= 1024 ? 1024 : ddraw->height <= 2048 ? 2048 : ddraw->height <= 4096 ? 4096 : ddraw->height;
tex_width = tex_width > tex_height ? tex_width : tex_height;
float scale_w = (float)ddraw->width / tex_width;
float scale_h = (float)ddraw->height / tex_height;
@ -139,12 +139,12 @@ DWORD WINAPI render_main(void)
// primary surface texture
GLenum surfaceFormat = GL_LUMINANCE;
GLuint surfaceTexIds[2];
GLuint surfaceTexIds[TEXTURE_COUNT];
glGenTextures(2, surfaceTexIds);
glGenTextures(TEXTURE_COUNT, surfaceTexIds);
int i;
for (i = 0; i < 2; i++)
for (i = 0; i < TEXTURE_COUNT; i++)
{
glBindTexture(GL_TEXTURE_2D, surfaceTexIds[i]);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
@ -172,11 +172,11 @@ DWORD WINAPI render_main(void)
}
// palette texture
GLuint paletteTexIds[2];
GLuint paletteTexIds[TEXTURE_COUNT];
glGenTextures(2, paletteTexIds);
glGenTextures(TEXTURE_COUNT, paletteTexIds);
for (i = 0; i < 2; i++)
for (i = 0; i < TEXTURE_COUNT; i++)
{
glBindTexture(GL_TEXTURE_2D, paletteTexIds[i]);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
@ -512,7 +512,9 @@ DWORD WINAPI render_main(void)
{
if (InterlockedExchange(&ddraw->render.paletteUpdated, FALSE))
{
palIndex = (palIndex + 1) % 2;
if (++palIndex >= TEXTURE_COUNT)
palIndex = 0;
glBindTexture(GL_TEXTURE_2D, paletteTexIds[palIndex]);
glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, 256, 1, GL_RGBA, GL_UNSIGNED_BYTE,
@ -521,7 +523,9 @@ DWORD WINAPI render_main(void)
if (InterlockedExchange(&ddraw->render.surfaceUpdated, FALSE))
{
texIndex = (texIndex + 1) % 2;
if (++texIndex >= TEXTURE_COUNT)
texIndex = 0;
glBindTexture(GL_TEXTURE_2D, surfaceTexIds[texIndex]);
glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, ddraw->width, ddraw->height, surfaceFormat, GL_UNSIGNED_BYTE,
@ -681,8 +685,8 @@ DWORD WINAPI render_main(void)
}
HeapFree(GetProcessHeap(), 0, tex);
glDeleteTextures(2, surfaceTexIds);
glDeleteTextures(2, paletteTexIds);
glDeleteTextures(TEXTURE_COUNT, surfaceTexIds);
glDeleteTextures(TEXTURE_COUNT, paletteTexIds);
if (glUseProgram)
glUseProgram(0);